NASCAR has taken a significant stride toward at-track inclusivity with the introduction of the NASCAR Mobility Pit Box. Developed in collaboration with Toyota, this innovative pit box offers a fully functional experience tailored for individuals with mobility challenges.

The NASCAR Mobility Pit Box was designed to ensure that all fans, regardless of physical abilities, can enjoy the excitement of race-day action up close. Over 21 race weekends in 2024, the NASCAR Mobility Pit Box hosted over 140 individuals with mobility challenges.

The inspiration for the pit box came from former BMX racing cyclist and NASCAR fan Sam Willoughby. Willoughby suffered a career-ending injury in 2016, four weeks after the Rio Olympics. The injury left him with tetraplegia — a paralysis that can affect the arms and legs.

Willoughby attended the 2020 Daytona 500 with Toyota and was asked what could be done to improve his experience at the race track. “About the only thing I didn’t get to do was go in a pit box,” Willoughby said. From there, NASCAR and Toyota went to work.

LEARN MORE: NASCAR Salutes | NASCAR Impact

A pivotal component of the pit box is its integrated ramp and lift system, facilitating smooth and safe entry for guests using wheelchairs or other mobility aids. The pit box offers ample room for maneuverability, ensuring guests can comfortably navigate and enjoy the race from a prime viewing location.

Designed to accommodate three guests in mobility devices along with their companions, the pit box incorporates state-of-the-art features aimed at enhancing comfort and accessibility, including climate assist.

“This setup is absolutely unbelievable,” said JD Holland, who experienced the pit box at Charlotte Motor Speedway during the Coca-Cola 600 weekend. “I hate to be in the condition to have to use it, but the effort everyone has put in to provide this opportunity for an ADA (American with Disabilities Act) recipient, this is absolutely great.”

JD’s father, Melvin, was honored at this year’s Coca-Cola 600 and featured on Pace Car 1 for his sacrifice while serving in the United States Air Force.

“I hope that everybody that gets the opportunity to be up here enjoys it as much as we did,” Holland added. “The assistance everybody has provided with getting us around, wheelchairs, ADA golf carts, elevators instead of stairs, just that whole hospitality from Day 1 when we got here. It’s absolutely wonderful.”

The NASCAR Mobility Pit Box represents a shift in the accessibility landscape within motorsports. Combining cutting-edge technology with a commitment to inclusivity sets a precedent for future innovations aimed at enhancing the fan experience for individuals of all abilities.

The NASCAR Cup Series Championship 4 drivers Tyler Reddick, Joey Logano, Ryan Blaney and William Byron will all be together for a panel hosted and moderated by Kim Coon, streaming live on NASCAR.com, NASCAR’s YouTube channel and NASCAR social media on Tuesday, Nov. 5 starting at 2 p.m. ET.

RELATED: Watch Championship 4 live stream | Phoenix weekend schedule

The stream will last until 2:20 p.m. ET at NASCAR’s production facility in Concord, North Carolina, kicking off Championship media coverage.

The Tuesday afternoon event marks the first appearance of all four contenders for the Bill France Cup, leading up to Sunday’s season finale race at Phoenix Raceway, where the 2024 NASCAR Cup Series champion will be crowned on Sunday, Nov. 10 (3 p.m. ET, NBC, MRN Radio, SiriusXM NASCAR Radio, NBC Sports App).

NASCAR officials will look further into the on-track actions of multiple competitors Sunday night in the NASCAR Cup Series’ Round of 8 finale at Martinsville Speedway.

The No. 1 Trackhouse Racing Chevrolet piloted by Ross Chastain, the No. 3 Richard Childress Racing Chevrolet driven by Austin Dillon and the No. 23 Toyota of 23XI Racing wheeled by Bubba Wallace all fall under scrutiny for how they raced in the closing laps of Sunday’s Xfinity 500.

NASCAR’s senior vice president of competition Elton Sawyer said Sunday the officials’ immediate focus in the moment centered around Christopher Bell’s wall ride in the final corner, but said he anticipated a deeper examination lied ahead once clear of Sunday’s event.

“We’ll look at everything,” Sawyer said. “As I said earlier, we want to go back, as we would have done anyway. We’ll get back, we’ll take all the data, video. We’ll listen to in-car audio. We’ll do all that, as we would any event.”

RELATED: Race recap | Final Laps

In the late stages of the 500-lap race, William Byron’s No. 24 Hendrick Motorsports Chevrolet faded quickly from the front of the field after leading 51 circuits. Every spot lost dropped Byron closer to the elimination line until he settled in sixth place on the track, just one point ahead of Christopher Bell in the provisional playoff standings and in position to advance to the Championship 4. Bell was running in 19th place, the first car one lap down.

Behind Byron, the Chevrolets of Chastain and Dillon effectively created a blockade, both running side-by-side and not passing Byron over the final 10 laps. Those passes would have dropped Byron out of the Championship 4.

Elsewhere on track, Wallace’s No. 23 Toyota slowed significantly over the final five laps, eventually getting lapped by race leader Ryan Blaney. On the final lap, Bell surged past the slowing Wallace entering Turn 3, slid through the rubber marbles on the track and rode his car along the outside retaining wall coming to the checkered flag.

Bell crossed the finish line 18th, tying Byron for the final Champ 4 position and provisionally advancing on a tiebreaker. But after a review, officials penalized Bell for the wall ride, deeming it a safety violation and moving Bell to the final car one lap down, resulting in a 22nd-place finish for Bell and allowing Byron advancement instead.

The NASCAR Cup Series returns to action in its Championship Race at Phoenix Raceway on Sunday afternoon (3 p.m. ET, NBC, MRN, SiriusXM NASCAR Radio, Peacock).

The last four Cup Series champions have a dubious distinction in common: They all failed to reach the Championship 4 the previous year.

So while the 2024 championship campaigns ended with the Round of 8 at Martinsville Speedway for Christopher Bell, Chase Elliott Denny Hamlin and Kyle Larson, there’s hope for next year — especially considering it’s a quartet that already has a combined 11 appearances in the title race.

But there also was something missing in the 2024 playoffs.

MORE: Blaney surges to Champ 4 spot | 2024 Championship 4 locked in

Here’s what went wrong in this year’s stretch run and what needs to improve next season for the four stars who came up just short of a Cup championship:

CHRISTOPHER BELL

Round of 8 results: Two top fives but missed advancing by four points because of an ill-timed caution at Las Vegas Motor Speedway and an illegal wall ride at Martinsville Speedway.

Playoffs performance:  Just as in its Championship 4 berths in 2022-23, the No. 20 Toyota again rose to another level with two pole positions, five top fives and 281 laps led. But while he was always in the fight, Bell and his pit crew faltered at meeting the moment with unforced errors at Martinsville Speedway.

For a 2025 title, less of this: Checkers or wreckers. Bell had six finishes of 30th or worse because of crashes, though all came before the playoffs.

… and more of this: Second-half victories — all three of his wins were before the season’s midpoint.

CHASE ELLIOTT

Round of 8 results: Ended with two top-five finishes but a 33rd in the opener left him 44 points shy of advancing to his fourth title race.

Playoffs performance: The No. 9 Chevrolet had four top fives but also was consistently inconsistent with one blemish in every round. A poor pit stop was the culprit in a 19th at Watkins Glen International, and it was wrong place, wrong time in crashes at Talladega Superspeedway (29th) and Las Vegas Motor Speedway (33rd).

For a 2025 title, less of this: Untimely hiccups by driver and team. Both factored into blunting Elliott’s momentum at Martinsville with a 20-second pit stop and then a bizarre collision with Chris Buescher.

… and more of this: Victories. It’s been two years since his last multiple-win season (and a career-best five victories in 2022).

Brittney Wilbur | NASCAR Digital Media

DENNY HAMLIN

Round of 8 results: Despite three top-10 finishes (and a huge “what if?” in narrowly missing a victory at Homestead-Miami Speedway), he finished at a 24-point deficit of advancing to his fifth Championship 4.

Playoffs performance: After opening with his two worst results (24th at Atlanta, 23rd at Watkins Glen), the No. 11 Toyota team never really found its stride afterward. Equal blame to share between the crew chief (faulty strategy at Atlanta), pit crew (abysmal at Las Vegas) and driver (blew it on the last restart at Homestead).

For a 2025 title, less of this: Inconsistency. Until he closed the Round of 8 with a third and fifth-place finish, Hamlin hadn’t scored consecutive top fives since posting five in a row from April 28-June 2.

… and more of this: Clean races. That starts with more performance from the pit crew, but Hamlin and crew chief Chris Gabehart simply lacked trademark execution during their sixth season together.

KYLE LARSON

Round of 8 results: Unable to recover from consecutive finishes outside the top 10 at Las Vegas and Homestead, he was seven points short of making his third title race.

Playoffs performance: Mostly feast or famine. The No. 5 Chevrolet was a world-beater with no equal in winning at Bristol Motor Speedway and the Charlotte Motor Speedway Roval. Though strong at tracks where he has struggled (Talladega, Martinsville), he had weak results at his 1.5-mile benchmarks (Kansas, Homestead).

For a 2025 title, less of this: Indy 500 distractions. At least it’s been guaranteed that Larson won’t lose the Regular Season Championship by missing the Coca-Cola 600 again.

… and more of this: Walking that tightrope between overstepping the limit and driving at a maximum few others can reach. Though he occasionally still crossed the limit (Homestead), Larson was as good as ever at harnessing his team’s blinding speed in 2024.

Nate Ryan has written about NASCAR since 1996 while working at the San Bernardino Sun, Richmond Times-Dispatch, USA TODAY and for the past 10 years at NBC Sports Digital. He is the host of the NASCAR on NBC Podcast and also has covered various other motorsports, including the IndyCar and IMSA series.

During the 2024 NASCAR Cup Series Playoffs, fans have the opportunity to compete in The NASCAR Playoffs Grid Challenge Presented by Goodyear on their own or as part of a created league.

And now picks for the Championship 4 are open, so fans can visit The Playoffs Grid Challenge page and make their picks before Sunday’s race at Phoenix Raceway (3 p.m. ET, NBC, MRN Radio, SiriusXM NASCAR Radio, NBC Sports App). Register for a free NASCAR.com account and begin making your picks.

RELATED: How the NASCAR Playoffs work

Why do I need an account?

Registering for an account allows you to score points and track your progress throughout the NASCAR Cup Series Playoffs. Additionally, a NASCAR.com account allows you to track the latest news, customize updates and learn inside information throughout the playoffs and beyond. If you already have a registered NASCAR.com account, simply logging in with the same credentials will allow you to compete without additional steps or the creation of a new account.

Can I create multiple entries?

All entrants are eligible to create up to three entries per person.

Does The Playoffs Grid Challenge work on mobile?

Participants are able to access the challenge and fill out brackets on mobile web and desktop applications.

Can I set up a league?

In addition to joining the overall leaderboard, participants can create their own leagues to compete with friends and others throughout the community. Leagues can be public and available for anyone to join or private and password-protected. To join or create a league, follow the instructions on the Leagues tab. There, you can see participants, standings and point totals for each of your league entries. Creating or joining a league does not impact eligibility to win prizes.

When do I make my picks?

The Playoffs Grid Challenge is conducted in a round-by-round format, mirroring the 2024 NASCAR Cup Series Playoffs elimination rounds. Beginning with the first opportunity to register on Aug. 12, each round has a window for participants to make their picks. When choosing drivers, list them in the correct order you think they will finish in.

Selections for the playoff-opening Round of 16 (drivers you believe will advance to the Round of 12) can be submitted before 3 p.m. ET on Sept. 8. Not long after the elimination race at Bristol Motor Speedway, points are awarded and the Round of 12 selections (drivers you believe will advance to the Round of 8) will open until 3 p.m. ET on Sept. 29. After the Charlotte Motor Speedway road course, Round of 8 selections (drivers you believe will make it to the Championship 4) will be available until 2:30 p.m. ET on Oct. 20. The Championship 4 and final round opens after the race at Martinsville Speedway (picking the driver you believe will win the title) and must be submitted before 3 p.m. ET on Nov. 10.

RELATED: Cup Series schedule

Is there a points system?

Yes. During each round, participants will earn points based on their selections. Participants will receive 10 points for each driver correctly selected to advance to the next round of the playoffs, except for the Championship Round™. For the final round, all coming down to the finale at Phoenix Raceway, the correct driver chosen to win the 2024 Cup Series championship earns participants 40 points.

Five bonus points (per correct pick) are also awarded for arranging playoff drivers in the correct finishing order and one point for finishes one spot before or after. Points carry from round to round, and the eligible participant with the most points at the end of the Championship Round will be declared the winner.

Scoring factors in official finishing order after post-race inspection.

What are the prizes I can win for competing?

Cash prizes for The Playoffs Grid Challenge are awarded to the top three eligible entrants in the overall standings. One first-place winner will receive $10,000, one second-place winner will receive $5,000 and one third-place winner will receive $2,500. Participants can track their place in the standings with the live leaderboard throughout each round of the playoffs. Accounts listed in the top three positions — or any other position — may not necessarily be the top participants eligible to win prizes.

See the official rules for additional information on rules, eligibility, prizes, tiebreak procedures and more.

Who are the 2024 NASCAR Cup Series Playoffs drivers?

The 16-driver field was officially cemented on Sept. 1 following the conclusion of the regular-season finale at Darlington Raceway.

Four drivers are eliminated after each round, ending with the Championship 4 battling for the Bill France Trophy at Phoenix Raceway.

To keep track of who’s still in the playoffs, visit our standings page and click on the playoffs tab.

Justin Allgaier and Cole Custer both clinched return trips to the NASCAR Xfinity Series’ Championship 4 field on the basis of points last weekend, with Allgaier’s ride at Martinsville Speedway playing out a little less dramatically than Custer’s in the emotionally charged Round of 8 finale.

For Custer, it’s the opportunity to claim back-to-back titles and give Stewart-Haas Racing a winning send-off. For Allgaier, it’s the chance to finish one rung better than Custer in a championship-race redux and to fulfill a dream he’s spent 14 Xfinity Series seasons chasing.

Allgaier and Custer will match wits with Round of 8 race winners AJ Allmendinger and Austin Hill in Saturday’s championship race (7 p.m. ET, The CW, MRN Radio, SiriusXM NASCAR Radio) at Phoenix Raceway. Allgaier landed in the Championship 4 field for the fifth time in the last six seasons, and now that he’s there, the 38-year-old veteran has an expectation that he’ll be in contention.

RELATED: Xfinity Series schedule

Part of that confidence stems from his most recent performances at Phoenix, a track where he’s won twice (2017, 2019). Last season, Allgaier wound up third after a two-lap overtime shuffle to decide the finale. This spring, the JR Motorsports driver led 52 laps and built a three-second lead before a left-rear tire failure sidelined his No. 7 Chevrolet with just five laps to go.

“I mean, if I have one race track on my calendar that’s circled, it’s this fall race — not only because it’s a good race track for us, but the way that the spring race ended,” Allgaier said post-race at Martinsville, where a fifth-place finish allowed him to advance by 35 points. “I mean, I left there fully dejected, knowing that we had the dominant car, and we walked out of there with a wrecked pile of junk and didn’t get to win the race. So to be able to leave here with a shot at it, knowing what we’re taking back next week, I have no doubt in my mind we’re going to have a great piece, and we’ll see what we can do.”

The journey to Phoenix was far from a smooth one. Allgaier won twice during the regular season to ascend to the top of the Xfinity Series standings, but a late slump that included a rough 30th-place result at Bristol Motor Speedway left him three points short of the regular-season title, which was snapped up by Custer.

Allgaier’s sour luck continued in the postseason’s opening round, with finishes of 36th at Kansas and 25th at Talladega. A seventh-place finish plus a bounty of stage points in the Round of 12 finale at the Charlotte Motor Speedway Roval helped him overcome an 18-point deficit and advance by just four points. His Round of 8 was far more comfortable — third at Las Vegas Motor Speedway, eighth at Homestead-Miami Speedway and ultimately fifth at Martinsville.

“I mean, you look at the way the first two races in the first round started, to be honest with you, I thought we were going to be sitting on the couch, not even be here to Martinsville,” Allgaier said. “To turn all of that around, to put ourselves in contention for not only a top four in the points but a championship, I mean, that’s what you eat, sleep and breathe for … these 10 months that we do this on the race track. So I’m proud of the effort.”

MARTINSVILLE, Va. — 2.9 seconds.

This was the gap differential Ryan Blaney had to leader Kyle Larson as the No. 12 Team Penske driver passed William Byron for third with 42 laps to go.

Forty-two circuits may seem like a long time but at Martinsville Speedway Sunday evening, it took 15 minutes to get to Lap 500.

In those 15 minutes, Blaney made a hard charge at Hendrick Motorsports teammates Larson and Chase Elliott to erase the 2.9-second difference, took the lead with 14 to go and grabbed the checkered flag for a second consecutive season to punch his ticket to the Championship 4 in walk-off fashion.

When Blaney moved to third, he was unsure whether he had the time to run down both Larson and Elliott but was banking on lapped traffic to be his last gasp.

RELATED: Race results | At-track photos: Martinsville

“When I got to Byron, the 5 [Larson] kind of seemed pretty far away and I didn’t think I had a ton of laps left,” Blaney said. “But I tried to keep in mind like they’re going to catch the back of the pack and they’re going to slow down a lot because it happens every run. Honestly, I just like beat into my brain of just saving rear tire for that moment, because I used up rear tire trying to pass the 6 [Brad Keselowski] earlier in the race when I ran him down pretty quick, and I just had no rear tire left to pass him, so I just tried too hard.

“I just tried to stay disciplined, knowing they would back up to me and I needed something to try to pass those guys and have something on corner exit. I didn’t know if I was going to get there. I knew there was a shot and really my focus was just saving rears in case I did get a chance. I’d be able to capitalize on it like I wasn’t able to with the 6 because I burnt my stuff up. It was a long way back we came from. But I think saving a little bit there and being mindful of rears when I got to traffic allowed me to be a little bit more versatile when I got to those guys.”

Blaney had a bit of a tussle with Larson for second as the defending Cup Series champion moved the No. 5 in Turns 3 and 4 to take the spot.

Larson fought back with a shot to the rear of Blaney the following lap as payback but Blaney held his ground and took off for Elliott.

With Elliott and Blaney the bottom two in the playoff table entering Sunday’s elimination race, both needed a victory to advance and it looked as though they would have to beat and bang for the win as a packed grandstand watched under the lights. Blaney, however, was able to get a huge run off Turn 2 on Lap 486 and get to the inside of Elliott down the backstretch to complete a clean pass on the 2020 champion to take the lead.

While having a relatively clean race despite fenders rubbed, Blaney described his fatigue after climbing out of his hot rod to a roaring crowd.

“My God, I was tired. Still am. Most worn out I’ve been, for sure,” Blaney emphasized. “We stuck with it all night. It’s nice when things work out like that for you. I laid the bumper to more guys than I would have liked tonight. I guess fight, determination and the drive was great. How much time we made up is awesome. You can make up that time when your car is really good and we got our car really good. It makes me look like a hero, but at the same time [crew chief] Jonathan [Hassler] and those guys did an awesome job of getting us where we need to be. So definitely a joint effort.”

Compared to last year’s triumph, Blaney had to dig a little deeper to have the drive after last week’s heartbreak at Homestead-Miami Speedway.

Saying “I feel like the mental side is the toughest thing about our sport” days before making the trek to Martinsville, the payoff Sunday equated to one of the defining moments in Blaney’s young career, as he’ll now carry momentum to the championship race next Sunday.

Blaney will duke it out in the Arizona desert for a second Bill France Cup against regular-season champion Tyler Reddick, William Byron and Team Penske teammate Joey Logano, a two-time series champ.

With a string of highs and lows throughout 2024, including four DNFs in a seven-race span from Daytona to Talladega in the playoffs, Blaney has stopped the timer from winding down to zero on his title hopes and come next Sunday, will look to have the clock strike 12 once again.

“This 12 group is just dogs, man,” Blaney said. ” I mean, we’ve dealt with a lot of adversity through the year. Ups and downs and getting wrecked and getting caught up in BS that’s not our fault. And everyone kind of overlooks this group, to be honest with you, especially in the playoffs. Like, we’ll have a good week and then we’ll get wrecked the next week … and we have a decent week, and it’s just the ups and downs. This team has been fantastic all year. Just hasn’t been the smoothest of years. But it’s cool to go to battle with them every week, and looking forward to go into battle with them again next week.”

MARTINSVILLE, Va. — Two years after Ross Chastain made himself a viral star with the “Hail Melon,” the complexion of the NASCAR Cup Series’ Championship 4 field again came down to a fateful last-lap meeting with Martinsville Speedway’s outside retaining wall.

Christopher Bell’s version Sunday night was more of a half-melon that forced a tiebreaker with fellow playoff contender William Byron, but instead of saving his postseason fate, the result was a full penalty that shattered his season-long dream.

Byron will vie for the Bill France Cup in 2024 after a final-lap review of Sunday’s Xfinity 500, the Round of 8 finale at Martinsville Speedway that left both Bell and Byron in an agonizing wait to learn their outcomes. Ryan Blaney had snapped up the third title spot on the strength of his stirring drive to his second consecutive victory in Martinsville’s autumn showdown. The fourth and final title-eligible berth was in limbo some 25 minutes after the checkered flag.

Initially, it looked to be Bell. He crossed the start/finish line in 18th place, provisionally putting the Joe Gibbs Racing driver into a tiebreaker with Byron in the playoff standings. But the way he grabbed that position came under scrutiny after his No. 20 Toyota went hard below the fading No. 23 Toyota of Bubba Wallace into the third turn, carrying both cars up out of the groove. Bell’s car made contact with the outside wall and scraped along the barrier as he muscled his way to the front straightaway.

RELATED: Race results | At-track photos

Bell’s move created a points deadlock between him and Byron, a tiebreak that would have gone in   Bell’s favor based on best finish in the Round of 8. But after a lengthy post-race discussion, NASCAR officials deemed Bell’s move a safety violation, dropping him instead to a 22nd-place finish as the final car one lap down. That gave the final championship berth to Byron, who advanced by just four points after holding on for a sixth-place result.

Sitting on the outside pit wall, Bell pursed his lips after the remaining crowd reacted to the announcement over the track’s public-address system. No. 20 crew chief Adam Stevens gently shook his head and threw his gum over his left shoulder. An eventful day that included a modest rally from an early spin and an unscheduled pit stop for loose wheels was over.

“It’s a bummer, but in the grand scheme of things, there’s a lot of things that we did poorly today that we could have done better within our control,” Bell said. “So yeah, I don’t know. We accomplished a lot of things this year. The championship won’t be one of them, but we’ll try again next year.”

Chastain’s “Hail Melon” move at Martinsville in 2022 is remembered as a go-for-broke maneuver plucked from the video-game world that put the Trackhouse No. 1 Chevy driver into the title race for the first time. Chastain gained multiple spots with a full-throttle ride of the wall, but while its creativity was celebrated, the increased safety risk was not.

Before the next season began, NASCAR banned the move by establishing rule 10.5.2.6.A, which states: “Safety is a top priority for NASCAR and NEM (NASCAR Event Management). Therefore, any violations deemed to compromise the safety of an Event or otherwise pose a dangerous risk to the safety of Competitors, Officials, spectators, or others are treated with the highest degree of seriousness. Safety violations will be handled on a case-by-case basis.”

Stevens joined owner Coach Joe Gibbs and other team officials in meeting with NASCAR’s competition crew to argue their post-race case that the original finish should stand. But NASCAR Senior VP of Competition Elton Sawyer stated that in-race infractions cannot be appealed and that the No. 20 car’s move merited a safety violation in a “pretty straightforward” ruling, saying that he wouldn’t speculate on Bell’s intent.

“If we’re just talking about the decision, this situation is nothing like the situation of the 1 car,” Stevens said after his visit to the Cup Series hauler. “We attempted to make the corner. We passed the 23. We got into the marbles. He got into the fence, after we passed the 23. We slowed down a full second from our previous lap. We weren’t up there matting the gas and grabbing gears. It’s just a different situation. It sucks that it’s a judgment call and you can’t appeal an in-race violation, but I just don’t see anything that’s even remotely close to what the 1 did that they outlawed.”

Byron, meanwhile, returned to the Championship 4 for the second straight year and will bid for his first Cup Series crown in next Sunday’s season finale (3 p.m. ET, NBC, MRN Radio, SiriusXM NASCAR Radio, NBC Sports App) at Phoenix Raceway. It was the second consecutive year that he had eked his way into the final four by single digits, and his view of Bell’s bold move came from a different perspective.

“I’ve never been through anything like that, so definitely some trauma from that for sure,” Byron said of his wait, “because I usually get to go home by now. So yeah, just don’t really know what to think about all that, but thankful that NASCAR looked at it, that they have rules in place and that’s what it is.”

Byron led 51 laps and was in contention into the final stage, but his No. 24 Chevrolet had begun to fade in the closing laps. Even though Bell was trapped a lap down in 19th place for the final stretch, he chipped away at the margin as Byron began to slip from second place out of the top five in the last 100 laps.

Once Byron dipped to sixth place, he fell no further as fellow Chevy drivers Chastain and Austin Dillon ran side by side behind him. Sawyer said that their actions and radio transmissions would be subject to review later next week, and that competition officials would also look at the No. 23 team’s final-lap actions.

Stevens was among those leveling accusations about a Chevrolet blockade, citing a perceived unwillingness to pass Byron late.

“That looked pretty obvious to me. I’m sure it did to a lot of people,” Stevens said. “They clogged the track up and hunkered down, and easily could have both passed him and then a couple more cars as well. So I mean, I think that’s a bad look, but bad looks aren’t going to put me in the Championship 4 apparently.”

Bell was measured in his post-race comments, saying multiple times that he was at a loss for words. “I’m not bitter,” he said. “It just wasn’t meant to be, and I’m proud of the successes that we’ve had in 2024. It’s a bummer to not go to Phoenix, because obviously that’s a track we’re really good at. But thankfully, I’ve got a couple more years on my contract, so I’ll get another shot at it.”

Byron will be the lone representative for Hendrick Motorsports in the championship battle after the clock ran out on teammates Kyle Larson and Chase Elliott at Martinsville. The organization celebrated a key moment in its 40th anniversary season here back in the spring, registering a 1-2-3 finish that was led by Byron’s No. 24 with Larson and Elliott in tow.

Sunday’s return to Martinsville meant higher stakes and nerves, as Hendrick Motorsports vice chairman Jeff Gordon watched the playoff picture transform through the 500-lap race — from the possibility of two team cars advancing, to one, to potentially none. Byron waited it out like the rest, controversy or not.

“In this situation, I mean, it’s hard to feel like it’s a win,” Gordon said, minutes after the ruling was announced. “It’s disappointing, and it’s controversial and you don’t want to see it come down like that. But at the same time, you want to see your team go have a shot the championship. And so, that was up to NASCAR to make that decision. They did, and now, all eyes forward on going and racing for a championship.”

Contributing: Cameron Richardson, staff reports

MARTINSVILLE, Va. —  He did it again.

For the second straight year, defending series champion Ryan Blaney won the NASCAR Cup Series Round of 8 elimination race at Martinsville Speedway to advance to the Championship 4.

And as Blaney took the checkered flag to win Sunday’s Xfinity 500, Christopher Bell made a kamikaze move into the final corner in a futile attempt to deprive William Byron of the final spot in next Sunday’s title event at Phoenix Raceway.

RELATED: Race results | At-track photos: Martinsville

Bell drove hard into Turn 3 on the final lap, passed Bubba Wallace for the one point he needed, slipped up into the outside wall and rode the fence through Turn 4, committing what NASCAR deemed a safety violation. Bell was penalized four positions to 22nd as Byron advanced by four points.

Blaney passed Chase Elliott for the lead on Lap 486 of 500 and pulled away to win by 2.593 seconds over the Hendrick Motorsports driver, who was eliminated from the playoffs along with teammate and third-place finisher Kyle Larson.

“I’m worn out — I’ve got nothing left,” said Blaney, who ran down both Elliott and Larson from three seconds back after a restart on Lap 414.

“Oh, my God, I’m tired. Good battle, and this car hung on longer than most, and I could really make some ground.”

The victory was his third of the season, his second at the 0.526-mile short track and the 13th of his career.

CHAMPIONSHIP 4: View Cup, Xfinity, Truck Series field

Blaney joins Team Penske teammate Joey Logano in the Championship 4 after triumphing in a race that featured Goodyear’s option tire on the right sides of the cars and a softer compound on the left.

“The last 70 or so laps, I tried to save my rear (tires) the best I could, because that’s where I started struggling later in the runs,” said Blaney, who led 32 laps. “I hated I had to lay the bumper to some guys, but I had to do it. It was nice to pass the 9 (Elliott) clean. I laid the bumper to a couple guys that I wish I didn’t have to, but I needed to get going, so it was a long night.

“I appreciate everybody for getting (the No. 12 Ford) better through the night. Thank goodness. I think that’s the most tired I’ve been after a race in a long time.”

SHOP: Race winner gear

Byron came home sixth behind Austin Cindric and Denny Hamlin as the Chevrolets of Austin Dillon and Ross Chastain ran side-by-side behind him on the closing laps, boxing in the Ford of Brad Keselowski, who led a race-high 170 laps and won the second stage.

After the race, and before Bell’s penalty, Byron was adamant Bell had committed a violation by riding the wall in the final corner.

“He rode the wall, and there’s a clear rule against riding the wall,” Byron said, referring to the prohibition instituted after Ross Chastain shot around the outside wall through Turns 3 and 4 at Martinsville to advance to the Championship 4 in 2022.

“In my eyes, that’s what counts. … We all sat in meetings and talked about whether there should be a rule against it. His (Bell’s) front tires were off the ground coming off (Turn) 4 there, against the fence.”

WATCH: Blaney: ‘To have another shot at a championship is special’

After the ruling, Bell congratulated Byron on his advancement to the Championship 4. Bell had recovered from an early spin in Turn 2 and an unscheduled pit stop to tighten a loose wheel to make his last-ditch bid for the final playoff spot.

Had Bell retained his 18th-place finish, he would have edged Byron for the Championship 4 berth on a tiebreaker.

“It was Martinsville, and it was a Round of 8 cutoff race,” Bell said. “Unfortunately, I was on the bad side of it. Made a lot of mistakes, ran a sloppy race. It is a shame that it comes down to a ball-and-strike call like that.

“You can look at both sides of the fence — the Chevy organization had a lot of blocking going on so that the 24 (Byron) didn’t lose positions. I slid into the wall (on the final lap) and kept my foot into it. I guess that is a losing move.”

Along with Larson, Elliott and Bell, Hamlin failed to make the Championship 4, finishing 24 points below the elimination line.

Dillon finished seventh on Sunday, followed by Chastain, Keselowski and Logano.

Elliott won the first stage and led 129 laps. Larson led 71 laps and Byron 51 in a race that featured nine cautions for 66 circuits.

Championship 4 driver Tyler Reddick, who won last Sunday at Homestead-Miami Speedway, fell out of the race after completing 458 laps and finished 34th.

MORE: Phoenix schedule

However, Reddick, Logano, Blaney and Byron will start on even terms in next Sunday’s Championship 4 Race at Phoenix (3 p.m. ET, NBC, MRN Radio, SiriusXM NASCAR Radio, NBC Sports App).

NOTE: Post-race inspection in the Cup Series garage concluded without issue, confirming Blaney as the Martinsville race winner.

The 2024 Championship 4 came into focus Sunday evening following the Round of 8 finale at Martinsville Speedway, where 2023 Cup Series champion Ryan Blaney pushed ahead of Chase Elliott and Kyle Larson late to win at the short track and clinch his chance to go back-to-back at Phoenix Raceway.

And so, the stage is set for four Cup drivers to battle it out in the desert for the opportunity to hoist the Bill France Cup.

RELATED: Race results | At-track photos

The following Cup quartet will compete for a NASCAR Cup Series championship next Sunday at Phoenix (3 p.m. ET, NBC, MRN Radio, SiriusXM NASCAR Radio, NBC Sports App):

1. Ryan Blaney, No. 12 Team Penske Ford
2. Joey Logano,
No. 22 Team Penske Ford
3. Tyler Reddick,
No. 45 23XI Racing Toyota
4. William Byron, No. 24 Hendrick Motorsports Chevrolet

Joey Logano and Tyler Reddick came into Sunday’s final Round of 8 contest with Championship 4 berths already clinched, with the No. 22 Team Penske Ford prevailing at Las Vegas Motor Speedway and the No. 45 23XI Racing Toyota triumphing at Homestead-Miami Speedway. With Blaney’s Martinsville victory, one playoff driver — William Byron — clinched on points.

With the Cup Series title field now set, we have a full picture of who is racing for a championship crown in the season finale. Here are the other two Championship 4 fields.

2024 NASCAR Xfinity Series Championship 4

Race: Saturday, 7 p.m. ET (The CW, MRN Radio, SiriusXM NASCAR Radio)

1. Austin Hill, No. 21 Richard Childress Racing Chevrolet
2. AJ Allmendinger,
No. 16 Kaulig Racing Chevrolet
3. Cole Custer, No. 00 Stewart-Haas Racing Ford
4. Justin Allgaier, No. 7 JR Motorsports Chevrolet

2024 NASCAR Craftsman Truck Series Championship 4

Race: Friday, 8 p.m. ET (FS1, MRN Radio, SiriusXM NASCAR Radio)

1. Grant Enfinger, No. 9 CR7 Motorsports Chevrolet
2. Christian Eckes, No. 19 McAnally-Hilgemann Racing Chevrolet
3. Ty Majeski, No. 98 ThorSport Racing Ford
4. Corey Heim, No. 11 Tricon Garage Toyota