Lap-by-Lap: Daytona

CHECKERED FLAG: Ryan Newman wins the 50th Daytona 500 with drafting help from teammate Kurt Busch as they pass Tony Stewart on the backstretch of the final lap.

Lap 199 -- Tony Stewart leads the way on the final lap.

Lap 198 -- Single-file racing leads the way with Tony Stewart pacing.

Lap 197 -- LEAD CHANGE: Tony Stewart takes the lead on the outside and Jeff Burton drops without drafting help. Ryan Newman is second.

Lap 197 -- GREEN FLAG: Jeff Burton gets the race back under way.
1. Jeff Burton
2. Kyle Busch
3. Ryan Newman
4. Tony Stewart
5. Ryan Newman

Lap 195 -- YELLOW FLAG NO. 7: Casey Mears slaps the wall and has major damage. He was running third at the time. Mears went high to block Tony Stewart, but Stewart's momentum didn't give him enough room and sent Mears into the wall.

Lap 194 -- Kyle Busch has moved into second position and is trailing Jeff Burton.

Lap 193 -- Everyone is single-file with seven laps remaining.

Lap 192 -- GREEN FLAG: Jeff Burton gets the race back under way.
1. Jeff Burton
2. Greg Biffle
3. Ryan Newman
4. Kyle Busch
5. Casey Mears

Lap 190 -- Denny Hamlin is on pit road as the crew looks at his car.

Lap 189 -- YELLOW FLAG NO. 6: Dave Blaney brushes the wall during four-wide racing. Blaney got touched by Kevin Harvick, slid up the track and rode the wall.

Lap 188 -- LEAD CHANGE: Jeff Burton moves to the outside of Ryan Newman to take the lead.

Lap 187 -- GREEN FLAG: Ryan Newman gets the race back under way.
1. Ryan Newman
2. Juan Montoya
3. Jeff Burton
4. Greg Biffle
5. Kyle Busch

Lap 184 -- Clint Bowyer comes to pit road for new tires and to check for damage.

Lap 183 -- LEAD CHANGE: Ryan Newman inherits the lead due to Bowyer's spin.

Lap 183 -- YELLOW FLAG NO. 5: Clint Bowyer gets turned around while leading the race in a three-wide battle. Juan Montoya clipped the rear of Bowyer on the frontstretch. Bowyer simply spins and gets no damage.

Lap 181 -- LEAD CHANGE: Clint Bowyer takes the lead and shuffles Dale Earnhardt Jr. to the top lane.

Lap 180 -- GREEN FLAG: Dale Earnhardt Jr. gets the race back under way.
1. Dale Earnhardt Jr.
2. Clint Bowyer
3. Ryan Newman
4. Jeff Burton
5. Greg Biffle

Lap 177 -- LEAD CHANGE: Dale Earnhardt Jr. stays out and takes the lead.

Lap 177 -- Five leaders stay out but others pit:
• Kyle Busch overshoots his pit stall
• Tony Stewart is in for tires and to tighten the car
• Kasey Kahne is first out by gaining four positions
• Elliott Sadler is second out

Lap 176 -- YELLOW FLAG NO. 4: Jimmie Johnson spins coming off Turn 2. He got loose coming off the turn, got touched by Sam Hornish Jr. in the spin and collected Martin Truex Jr. as he slid in front of traffic.

Lap 172 -- LEAD CHANGE: Dale Earnhardt Jr. edges ahead for a lap as they cross the line, but Tony Stewart gets the top spot back. Kasey Kahne gets loose and goes to the bottom but recovers and falls back in line.

Lap 172 -- LEAD CHANGE: Tony Stewart is back out front.

50th Daytona 500

• Most memorable
• Winning drivers
• Winning crew chiefs
• History of the 500
• How DIS came to be
• Flashback: Daytona '79

Lap 171 -- LEAD CHANGE: Dale Earnhardt Jr. leads the lap when Tony Stewart slid to the high side after a minor bump from Junior.

Lap 170 -- LEAD CHANGE: Tony Stewart and Greg Biffle motor down the inside lane to take the front positions.

Lap 169 -- LEAD CHANGE: Kasey Kahne gets a push from Tony Stewart on the outside to take the lead in the two-wide battle. Matt Kenseth is back on the racetrack.

Lap 165 -- GREEN FLAG: Dale Earnhardt Jr. gets the race back under way.
1. Dale Earnhardt Jr.
2. Dave Blaney
3. Tony Stewart
4. Kasey Kahne
5. Clint Bowyer

Lap 162 -- LEAD CHANGE: Dale Earnhardt Jr. stays out and leads.

Lap 162 -- Leaders head down pit road except for Dale Earnhardt Jr.:
• Kyle Busch gets no adjustments, just four tires but loses nine spots
• Tony Stewart gets two tires and fuel
• Kasey Kahne gets two tires and fuel
• Dave Blaney gains 10 spots and is out first

Lap 161 -- YELLOW FLAG NO. 3: David Ragan slams hard into the wall and has major damage on the right-front. Several cars divert down pit road to avoid it. Teammate Matt Kenseth gets collected and has slight damage to the right-front due to Ragan cutting him off coming off Turn 4.

Lap 159 -- Jeff Gordon: "Suspension failure. We saw signs of this when we were testing. It's a product of the suspension we're running with these bump-stops. The handling went away and I don't know why. There's definitely a problem, and it's probably not just us."

Lap 158 -- LEAD CHANGE: Kyle Busch goes back to the point, passing Greg Biffle with help from teammate Tony Stewart.

Lap 156 -- GREEN FLAG: Greg Biffle gets the race back under way.
1. Greg Biffle
2. Kyle Busch
3. Tony Stewart
4. Dale Earnhardt Jr.
5. Matt Kenseth

Lap 154 -- Jeff Gordon heads to the garage. He made three pit stops but on the final one the team determined a right-front bracket was bent.

Lap 153 -- LEAD CHANGE: Greg Biffle wins the race off pit road and becomes the new leader. Denny Hamlin stays in the pits to fix his fender. Kurt Busch is back on pit road to make his stop.

Lap 152 -- LEAD CHANGE: Clint Bowyer is credited for leading the lap due to how they cross the line on pit road.

Lap 152 -- The leaders head down pit road:
• Clint Bowyer gets four tires and fuel but no adjustments
• Jeff Gordon gets adjustments to make his car free
• Kyle Busch drops the air pressure in his tires
• Tony Stewart gets minor adjustments
• Dale Earnhardt Jr. is free and gets a track-bar adjustment
• Kurt Busch misses his pit stall and drives through
• Michael Waltrip slides through his pit and has to back up

Lap 150 -- YELLOW FLAG NO. 2: Debris is on the racetrack.

Lap 145 -- Kenny Wallace heads to the garage after being black-flagged for failing to maintain minimum speed.

Lap 143 -- Rookie Sam Hornish Jr. is having a solid run in 10th position.

Lap 135 -- All three Michael Waltrip Racing cars are running nose-to-tail: David Reutimann (18th), Dale Jarrett (19th) and Michael Waltrip (20th).

Lap 132 -- Regan Smith has slowed and is off the pace after slapping the wall hard. He heads to pit road.

Lap 131 -- Denny Hamlin has some damage to his left-rear fender; sheet metal is hanging out, drastically affecting his ability to move through the draft. He's now running 20th.

Lap 130 -- After running as far back as 30th, Jimmie Johnson has battled his way back into the top 10, running 10th.

Lap 124 -- LEAD CHANGE: Kyle Busch motors back around Ryan Newman to take the lead once again and complete green-flag stops.
1. Kyle Busch
2. Ryan Newman
3. Dale Earnhardt Jr.
4. Tony Stewart
5. Clint Bowyer

Lap 123 -- LEAD CHANGE: Ryan Newman is the new leader when the Waltrip cars make their stops. Kurt Busch is penalized for speeding as he leaves pit road. He must serve a drive-through penalty.

Lap 122 -- LEAD CHANGE: Michael Waltrip takes the lead when Greg Biffle makes his pit stop. David Reutimann runs second, also a MWR car.

Lap 121 -- LEAD CHANGE: Kyle Busch pulls in to make his pit stop, giving the lead to Greg Biffle. Ryan Newman also pits, followed by the majority of the front-running cars. Biffle gets a track-bar adjustment.

Lap 120 -- Carl Edwards, Regan Smith and Martin Truex Jr. begin pit stops. Edwards gets service in 13.6 seconds.

Lap 110 -- LEAD CHANGE: Kyle Busch takes the lead from Greg Biffle with an inside pass in Turn 2.

Lap 109 -- LEAD CHANGE: Greg Biffle drafts past Roush Fenway Racing teammate Matt Kenseth to take the point.

Lap 108 -- LEAD CHANGE: Matt Kenseth puts his Ford out front for the first time, passing Kyle Busch. During the lead change, Kurt Busch dips low and gets two wheels into the infield grass on the backstretch trying to avoid Dale Earnhardt Jr.

Lap 100 -- At the halfway point, Kyle Busch leads. The leader at halfway has not won the Daytona 500 since Davey Allison in 1992. Pole-sitter Jimmie Johnson runs 30th with an extremely loose racecar.

Lap 98 -- Jeff Gordon gets by Kurt Busch to break up the brother combination and take second.

Lap 94 -- LEAD CHANGE: Kyle Busch edges past his brother Kurt Busch to lead. Meanwhile, the group behind them, led by eighth-place Dale Earnhardt Jr., comes across the stripe three-wide.

Lap 90 -- Dale Earnhardt Jr.'s shifter is stripped and he's having trouble shifting the car when getting up to speed. His crew is preparing a repair to hand to their driver.

Lap 88 -- Mark Martin has a tire going down and is off the pace. He dives onto pit road. Brian Vickers is also slow and heads to pit road.

Lap 86 -- LEAD CHANGE: Kurt Busch dives to the inside and passes Reed Sorenson for the top spot. Sorenson gets shuffled back.

Lap 85 -- GREEN FLAG: Reed Sorenson gets the Daytona 500 back under way.
1. Reed Sorenson
2. Kurt Busch
3. Kyle Busch
4. Jeff Gordon
5. Denny Hamlin

Lap 82 -- LEAD CHANGE: Reed Sorenson stays out to lead. Kurt Busch also stays out.

Lap 81 -- The leaders head to pit road:
• Kyle Busch gets fuel and right-side tires
• Greg Biffle gets two tires and fuel
• Martin Truex Jr. gains 12 positions and is out seventh
• Dale Earnhardt Jr. takes four tires and adjustments

Lap 80 -- YELLOW FLAG NO. 1: Debris is on the racetrack.

Lap 80 -- After the second round of green-flag stops, Kyle Busch leads by less than a second.
1. Kyle Busch
2. Jeff Gordon
3. Denny Hamlin
4. Matt Kenseth
5. Greg Biffle

Lap 77 -- LEAD CHANGE: Kyle Busch is the leader once again as Reed Sorenson pulls in for his stop. Ryan Newman is also in for tires and fuel, as is Travis Kvapil.

Lap 76 -- LEAD CHANGE: Reed Sorenson is the new leader as teammates Kyle Busch and Denny Hamlin make their stops. Both get four tires; Busch is out in 12.8 seconds. Tony Stewart, their other teammate, is also in.

Lap 75 -- Dale Earnhardt Jr., Juan Montoya and Kyle Petty are all on pit road. Matt Kenseth and Jimmie Johnson join them for green-flag stops. Johnson's car falls off the jack, costing him valuable time.

Lap 74 -- Casey Mears pulls in to make his four-tire pit stop. He was running just outside the top 20.

Lap 70 -- Elliott Sadler hits pit road early after working his way into the top 10. He has slight scrapes on his right side. He gets four tires and fuel.

Lap 68 -- LEAD CHANGE: The swapping between teammates continues as Kyle Busch snags the lead back from Denny Hamlin.

Lap 65 -- LEAD CHANGE: Denny Hamlin gets a strong run on the bottom and takes the lead as they cross the line.

Lap 63 -- The top eight cars are within a second of each other, with a tight battle going on for third, fourth and fifth as Denny Hamlin shuffles in the draft.

Lap 59 -- Sam Hornish Jr. is on pit road with a potential vibration problem. He gets four new tires.

Lap 56 -- Joe Nemechek is back on the track. His problem was a lug nut that went through the oil pan, but the team has repaired it.

Lap 55 -- LEAD CHANGE: Kyle Busch moves back around Denny Hamlin for the top spot.

Lap 54 -- Dale Earnhardt Jr. on the racing: "It's been rough all day. It wasn't this rough [Saturday]."

Lap 49 -- LEAD CHANGE: Denny Hamlin moves by Kyle Busch for the lead.

Lap 41 -- LEAD CHANGE: Kyle Busch takes the lead by passing Jeff Gordon after green-flag pit stops.
1. Kyle Busch
2. Jeff Gordon
3. Denny Hamlin
4. Dale Earnhardt Jr.
5. Matt Kenseth

Lap 41 -- Joe Nemechek is taking his car to the garage.

Lap 41 -- Dale Earnhardt Jr. reports he has a vibration. He fears that his lug nuts may not be tight. "It ain't real little. I haven't ever felt one like this. Not typical."

Lap 40 -- LEAD CHANGE: Jeff Gordon inherits the lead as Dave Blaney makes his stop.

Lap 39 -- LEAD CHANGE: Dave Blaney takes the lead as Denny Hamlin pulls in for four tires and a chassis adjustment. Joe Nemechek is back on pit road with a tire rub and engine problems. The crew goes under the hood.

Lap 38 -- Jeff Gordon, Kyle Busch and Dale Earnhardt Jr. all make pit stops as the majority of leaders come in. Tony Stewart gets four tires, as does Jimmie Johnson.

Lap 37 -- Michael Waltrip, Robbie Gordon, Kenny Wallace, David Gilliland and Dario Franchitti all pit. Jeff Burton pits as well, but he misses his pit stall. He backs up and makes his stop.

Lap 36 -- Kasey Kahne, Clint Bowyer and Carl Edwards all lead a large group down pit road. Edwards said his car is slightly tight and he's being conservative early in the race.

Lap 34 -- Sam Hornish Jr. hits pit road. He thought he had a vibration but is pitting slightly early to make sure his car is OK. John Andretti, Joe Nemechek and Casey Mears all pit.

Lap 25 -- Kurt Busch has told his crew he has a vibration and to be ready in case something's wrong.

Lap 20 -- LEAD CHANGE: Denny Hamlin makes his line work and motors past leader Jeff Gordon for the top spot.

Lap 20 -- Juniors are on the move: Dale Earnhardt Jr. has moved into second position; Sam Hornish Jr. is in fourth.

Lap 18 -- LEAD CHANGE: Jeff Gordon and Jimmie Johnson move to the inside of Denny Hamlin. Gordon makes it stick to take the point.

Lap 15 -- LEAD CHANGE: Denny Hamlin and Jeff Gordon team up to pass Tony Stewart, giving Hamlin the lead in the 10-car lead pack.

Lap 14 -- The cars have spread out and are no longer running in the two-wide, nose-to-tail pack.

Lap 10 -- Kevin Harvick: "This is absolutely amazing. We run all week, we haul ass. They drop the green and our car won't run."

Lap 8 -- Michael Waltrip has dropped back to 20th position after leading early.

Lap 7 -- Kevin Harvick is off the pace and has radioed to his crew that something is wrong with his engine. He thinks it may blow up soon.

Lap 6 -- LEAD CHANGE: Tony Stewart rides the draft and moves by teammate Denny Hamlin for the lead. He and Hamlin run nose-to-tail.

Lap 4 -- LEAD CHANGE: Denny Hamlin moves around Jimmie Johnson to take command as the rest of the field is two-wide.

Lap 3 -- LEAD CHANGE: Jimmie Johnson takes his turn to the outside with help from Denny Hamlin to take the lead.

Lap 1 -- Michael Waltrip pulls to the outside with help from Denny Hamlin to lead the first lap.

3:41 p.m. -- Jimmie Johnson and Michael Waltrip lead the grid to the green flag for the 50th Daytona 500.

3:35 p.m. -- Joe Nemechek will give up his 41st starting position to drop to the back due to missing driver introductions.

3:33 p.m. -- Grand marshal Junior Johnson pulls the pace car onto the racetrack to lead the cars onto the surface.

3:30 p.m. -- Former winners of the Daytona 500 give the season's first command: "Gentlemen, start your engines!"

3:26 p.m. -- Trisha Yearwood performs the national anthem.

3:25 p.m. -- Pastor Bobby Welch of First Baptist Church in Daytona Beach delivers the invocation.

2 p.m. -- The FOX pre-race coverage of the 50th Daytona 500 is under way.

1 p.m. -- It's sunny and nearly 80 degrees at Daytona International Speedway as drivers are less than three hours away from the green flag for the 50th Daytona 500. Green is set for 3:40 p.m. ET.

WEEKEND HEADLINES
• With a little luck, Harvick ready to defend 500 title
• Andretti humbled, excited about starting Daytona 500
• Yarborough about much more than a moment in '79
• Petty surprises in final 500 practice; Edwards fastest
• RCR undergoes change in hopes of surpassing HMS
• In 1959, first Daytona 500 changed city, sport forever
• Villeneuve out of No. 27 Cup car for foreseeable future
• At Daytona, Earnhardts share a winning history
• A lap around Daytona can be quite a bumpy ride
• NASCAR follows trend of increased bling for champs
• Toyota's outlook much more promising this year
• 10 to watch at Daytona