Greg Biffle dominated at Texas Motor Speedway, leading 219 of 334 laps. Credit: Autostock

Lap-by-Lap: Texas

Lap 334 -- Greg Biffle wins the Samsung/RadioShack 500; he's the ninth different winner in nine races at Texas Motor Speedway.

• It's Roush Racing's fourth victory at Texas -- all with a different driver: Jeff Burton (1997), Mark Martin (1998), Matt Kenseth (2002) and Greg Biffle (2005).

• Chip Ganassi Racing puts three drivers in the top five: Jamie McMurray (second), Casey Mears (career-best tying fourth) and Sterling Marlin (fifth).

• Biffle's victory trims Jimmie Johnson's lead in the standings to 135 points. Rusty Wallace vaults four places to third (-237) on the strength of his fourth top-10 finish in seven races. Kurt Busch is up five spots to fourth (-245) and Jeff Gordon is fifth (-247).

• Seventeen drivers are within 400 points and eligible for the Chase for the Nextel Cup; 23 drivers were eligible before the race.

	Jamie McMurray posted a season-best second-place finish for his second top-five of the year. Credit: Autostock
	ALSO A win would have been just the tonic for Casey Mears. As it was, he finished fourth, tying his career high. Jamie McMurray was second and Sterling Marlin fifth, putting all three Chip Ganassi cars in the top five at Texas.  •   Complete story, click here

Lap 330 -- The top 10: Greg Biffle, Jamie McMurray, Casey Mears, Jimmie Johnson, Sterling Marlin, Michael Waltrip, Kurt Busch, Dale Earnhardt Jr., Ricky Rudd and Rusty Wallace.

Lap 325 -- With 10 laps to go, Greg Biffle leads Jamie McMurray by more than 2.4 seconds. ... Defending champion Elliott Sadler is off the track.

Lap 318 -- Looking for his 13th consecutive top-10 finish and posting one of the fastest lap times, Jimmie Johnson passes Sterling Marlin for fourth place.

Lap 316 -- Jamie McMurray passes Casey Mears for second place.

Lap 311 -- Greg Biffle passes Casey Mears for the lead.

Lap 309 -- With 26 laps to go, Casey Mears again leads the field to the green flag, followed by Greg Biffle, Jamie McMurray, Sterling Marlin and Dale Earnhardt Jr.

Lap 304 -- Dave Blaney spins out in Turn 2 on the restart to bring out the 11th caution.

Lap 304 -- Green-flag racing resumes with Casey Mears, Greg Biffle, Jamie McMurray, Sterling Marlin and Dale Earnhardt Jr. in the top five. ... Chip Ganassi Racing has three cars in the top five: Mears (1), McMurray (3) and Marlin (4). ... The rest of the top 10: Jimmie Johnson, Kurt Busch, Rusty Wallace, Michael Waltrip and Ricky Rudd.

Point standings after 301 laps:
• 1. Jimmie Johnson
• 2. Greg Biffle (-130)
• 3. Elliott Sadler (-200)
• 4. Rusty Wallace (-214)
• 5. Mark Martin (-218)

Lap 297 -- Tony Stewart into the wall for the 10th caution (the track record is 12, set in 2000). ... Leaders to pit road on Lap 298. ... Casey Mears rolls the dice, takes only right-side tires and is first on and off pit road in 33.40 seconds.

Lap 281 -- Greg Biffle, whose pit stop was 13.8 seconds, leads the field to the restart, followed by Casey Mears, Jamie McMurray, Tony Stewart and Kurt Busch. The rest of the top 10: Jimmie Johnson, Dale Earnhardt Jr., Rusty Wallace, Michael Waltrip and Mark Martin.

Point standings after 277 laps:
• 1. Jimmie Johnson
• 2. Greg Biffle (-186)
• 3. Elliott Sadler (-209)
• 4. Jeff Gordon (-210)
• 5. Rusty Wallace (-226)

Lap 270 -- Ninth caution as Kasey Kahne wrecks coming out of Turn 4. ... Leaders finally come to pit road on Lap 277. ... Rusty Wallace has the fastest time off and on the track at 38.89 seconds; Tony Stewart was at 39.06 seconds.

Lap 260 -- The top five: Greg Biffle, Casey Mears, Jamie McMurray, Jimmie Johnson and Tony Stewart.

Lap 246 -- Green-flag racing resumes with Greg Biffle, Casey Mears, Jamie McMurray, Mark Martin and Tony Stewart in the top five. The rest of the top 10: Jimmie Johnson, Ricky Rudd, Michael Waltrip, Kasey Kahne and Kurt Busch.

Lap 241 -- Robby Gordon, running one lap down, spins coming out of Turn 2 and slaps the wall to bring out the eighth caution. ... Leaders will come to pit road on Lap 242. ... Greg Biffle, Casey Mears and Jamie McMurray are 1-2-3 out of the pits.

Point standings after 241 laps:
• 1. Jimmie Johnson
• 2. Greg Biffle (-112)
• 3. Mark Martin (-194)
• 4. Kurt Busch (-203)
• 5. Tony Stewart (-206)

Lap 240 -- Greg Biffle, in a backup car, has led a race-high 141 laps. He now leads Casey Mears, also in a backup car, by more than 2.4 seconds.

Lap 225 -- The top five: Greg Biffle, Casey Mears, Kurt Busch, Kasey Kahne and Jamie McMurray.

SAMSUNG/RADIOSHACK 500 •   Unofficial Results •   Unofficial Standings Lone Star WinnerBiffle celebrates his dominating victory in Texas Top finishersMcMurray, Johnson and Mears on their days Closing lapsBiffle cruises to the checkered flag Engine troublesStewart's day ends after his engine expires Down and outRobby gets loose and hits the wall on Lap 241 Rough startGreen goes for a spin and collects several cars Sign up for TrackPass now BUY YOUR NEXTEL DRIVER PHONE

Lap 219 -- Green-flag racing resumes. The top five: Greg Biffle, Casey Mears, Kurt Busch, Michael Waltrip and Kasey Kahne. The rest of the top 10: Mark Martin, Jamie McMurray, Tony Stewart, Jimmie Johnson and Rusty Wallace.

Lap 211 -- Caution is out for the seventh time after a fender patch flies off Travis Kvapil's car. ... Leaders pit on Lap 212. ... Jimmie Johnson is off and on the track in 39.56 seconds, picking up three spots to ninth place. ... Matt Kenseth, who lost four spots during the pit stops, also is penalized for speeding and moved to the end of the longest line. ... Jeff Burton gets the "Lucky Dog" pass.

Lap 200 -- Déjà vu: After the green-flag stops, Greg Biffle remains the race leader by more than 1.9 seconds over teammate Kurt Busch. Casey Mears is third, followed by Michael Waltrip and Mark Martin.

Lap 191 -- Ryan Newman receives a drive-through penalty after the crew lost a tire during his pit stop.

Lap 185 -- Leaders begin making green-flag pit stops, led by Jamie McMurray. ... Greg Biffle and Kurt Busch pit on Lap 186.

Point standings after 182 laps:
• 1. Jimmie Johnson
• 2. Greg Biffle (-94)
• 3. Mark Martin (-172)
• 4. Tony Stewart (-184)
• 5. Kurt Busch (-185)

Lap 177 -- Michael Waltrip passes Kurt Busch for second place -- 1.7 seconds behind Greg Biffle.

Lap 175 -- Greg Biffle, Kurt Busch, Michael Waltrip, Casey Mears and Kasey Kahne continue to lead the field.

Lap 166 -- All five Roush Racing cars in the top 10: Greg Biffle (1), Kurt Busch (2), Mark Martin (7), Matt Kenseth (8) and Carl Edwards (10).

Lap 160 -- We've reached the midpoint of the race, so it's time to settle into single-file racing for a while. Feel free to go make some Rotel dip, walk the dog or blow off the driveway. ... Nos. 1-5: Greg Biffle, Kurt Busch, Michael Waltrip, Kasey Kahne and Casey Mears.

Lap 150 -- Roush Racing, which has won three times in eight races at Texas, has four cars in the top 10: Greg Biffle (1), Kurt Busch (2), Matt Kenseth (7) and Mark Martin (8).

Lap 139 -- Casey Mears enters the top five.

Lap 130 -- The top five: Roush Racing's Greg Biffle, Kurt Busch and Matt Kenseth, followed by Jamie McMurray and Tony Stewart.

Lap 128 -- Michael Waltrip leads Greg Biffle and Kurt Busch to the flag on the restart -- and in Turn 3, Biffle and Busch pass Waltrip.

Lap 123 -- Sixth caution of the race is displayed, again for debris on the track. ... Robby Gordon receives the "Lucky Dog" pass. ... Leaders make their way to pit road on Lap 124. ... Michael Waltrip (39.17 seconds) wins the race off pit road over Greg Biffle, followed by Kurt Busch, Matt Kenseth and Jamie McMurray.

Point standings after 113 laps:
• 1. Jimmie Johnson
• 2. Greg Biffle (-105)
• 3. Tony Stewart (-173)
• 4. Kurt Busch (-191)
• 5. Mark Martin (-204)

Lap 110 -- Greg Biffle's lead is more than 1.13 seconds over Michael Waltrip, who is battling to fend off third-place Kurt Busch. Jamie McMurray and Kasey Kahne round out the top five. The rest of the top 10: Tony Stewart, Matt Kenseth, Jeremy Mayfield, Casey Mears and Ricky Rudd.

Lap 100 -- The top five: Greg Biffle, Michael Waltrip, Kurt Busch, Kasey Kahne and Jamie McMurray.

Lap 87 -- Greg Biffle passes Tony Stewart for the lead.

Lap 85 -- Green-flag racing resumes after the fifth caution period. ... Rusty Wallace issued a drive-through penalty to the back of the longest line for a fueling issue.

Point standings after 80 laps:
• 1. Jimmie Johnson
• 2. Kurt Busch (-180)
• 3. Rusty Wallace (-185)
• 4. Elliott Sadler (-189)
• 5. Greg Biffle (-194)

Lap 79 -- Caution for debris on the track. Leaders will make their second pit stop of the day on Lap 80. ... Tony Stewart wins the race back to the track, followed by Greg Biffle, Michael Waltrip, Kurt Busch and Matt Kenseth. The rest of the top 10: Kasey Kahne, Jeremy Mayfield, Jamie McMurray, Kevin Harvick and Jeff Gordon.

Lap 61 -- Sterling Marlin to the pits with a flat tire.

Lap 60 -- Tony Stewart continues to lead, ahead of Kurt Busch by more than 1.4 seconds. Greg Biffle is third, followed by Jeremy Mayfield and Rusty Wallace.

Lap 50 -- The top five: Tony Stewart, Kurt Busch, Jeremy Mayfield, Sterling Marlin and Dale Earnhardt Jr. ... Greg Biffle is charging hard, turning the fastest laps in the 178.6 mph range.

Lap 41 -- Tony Stewart passes Jeremy Mayfield for the lead.

Lap 40 -- Jeremy Mayfield leads the field on the restart, followed by Tony Stewart, Kurt Busch, Sterling Marlin and Ryan Newman. The rest of the top 10: Rusty Wallace, Jeff Gordon, Dale Earnhardt Jr., Greg Biffle and Bill Elliott.

	Bobby Labonte finished 102 laps behind after having to repair the front end to his No. 18 Chevrolet. Credit: Autostock
	ALSO Bobby Labonte stood in the garage Sunday, leaning against his Chevrolet's spoiler. In hindsight, he may have been hoping the spoiler would break. He dislikes it that much.  •   Complete story, click here

Lap 32 -- Coming off Turn 2, Jeff Green spins to bring out the fourth caution. While the field tries to avoid Green, Bobby Labonte, Kyle Busch, Bobby Hamilton Jr., Scott Wimmer, Travis Kvapil and Brian Vickers get banged up.

Lap 28 -- Green-flag racing resumes with Sterling Marlin, who took only right-side tires, leading Jeremy Mayfield. Jason Leffler takes his car to the garage.

Lap 23 -- Jason Leffler spins to bring out the third caution. He spins across the track and slams into the inside retaining wall. ... The field comes to pit road. While leaving his pit stall, Leffler gets into Terry Labonte, who is moving toward his pit stall, causing a traffic jam in the pits.

Lap 20 -- Jeremy Mayfield continues to show the way ahead of Kasey Kahne, Jeff Gordon, Tony Stewart and Dale Earnhardt Jr.

Lap 12 -- Racing resumes with Jeremy Mayfield leading Ryan Newman, Jeff Gordon, Tony Stewart and Kasey Kahne.

Lap 9 -- Scott Riggs slams into the wall entering Turn 3; caution out for the second time. Riggs takes his car behind the wall.

Lap 7 -- Green-flag racing resumes.

Lap 3 -- Jeremy Mayfield makes the pass for first place against Ryan Newman. ... Back in the pack, Dave Blaney spins coming off Turn 4 to bring out the first caution. Blaney escapes with no apparent sheet metal damage.

1:29 p.m. -- The green flag flies to begin the Samsung/RadioShack 500.

1:17 p.m. -- Grand marshals Troy Aikman and George Lopez -- the most unlikeliest pairing since Anna Nicole Smith and the National Enquirer -- give the command for the drivers to start their engines.

1:09 p.m. -- National Anthem performed by Josh Gracin. ... What's next -- a star on the Hollywood Walk of Fame for Ryan Seacrest? Have our standards have fallen that far into the abyss?

12:47 p.m. -- Kasey Kahne narrowly defeats Casey Mears in FOX's "Sexiest Driver" poll. Kahne received 50.3 percent of the vote.

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