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: 0px;">Robby Gordon is dropping to the rear due to an engine change. There will be a competition caution at lap 50.

Getting ready to go green (12:15): Hearing Sam Hornish Jr. is sick today and has a relief driver on standby. We'll keep an eye on that.

480 laps to go: Tony Stewart has moved through the field quickly and reached second place. He's chewing into leader Kevin Harvick's advantage now. Harvick leads Stewart, Kurt Busch, Matt Kenseth, Jimmie Johnson and Jeff Burton.

460 laps to go: Kevin Harvick still leads by two seconds, but Kurt Busch is now in second (he passed Tony Stewart). Stewart, Matt Kenseth and Jeff Gordon round out the top five. Jeff Burton, Denny Hamlin, Dale Earnhardt Jr., Jimmie Johnson and Jamie McMurray are the rest of the top 10.

There haven't been any cautions yet, but a competition caution is looming.

First caution: Joe Nemechek blew a tire, bringing out a caution. NASCAR decided it was close enough to lap 50 for the competition caution. After pit stops, Kevin Harvick and Kurt Busch come out first, followed by Matt Kenseth, Jeff Gordon, Dale Earnhardt Jr., Jamie McMurray, Tony Stewart, Mark Martin, Jimmie Johnson and Clint Bowyer.

There will be 451 laps to go on the restart.

440 laps to go: On the restart, Scott Speed had hard contact with someone and damaged his car, forcing him to pit under green. He's now off the track. Meanwhile, Kevin Harvick was just passed for the lead by Jeff Gordon. Kurt Busch then passed Harvick for third. Jamie McMurray and Jimmie Johnson are next in line.

Caution No. 2: David Stremme spun out trying to pass Mike Bliss, bringing out a caution. Tony Stewart was the only one of the lead pack to pit, perhaps because he wants to get off-sequence with the leaders. A bunch of other cars in the middle of the pack also pitted.

Jeff Gordon leads Kurt Busch, Kevin Harvick and Jamie McMurray. Jimmie Johnson has moved up to fifth, followed by Jeff Burton, Carl Edwards, Dale Earnhardt Jr., Mark Martin and Clint Bowyer.

Caution No. 3: David Reutimann spun out into the small patch of grass in Turn 2, bringing out a caution. The sequence started when Clint Bowyer (ninth) stacked up the field, and it started a chain reaction all the way back to Reutimann, who eventually got spun.

On the radio, Carl Edwards noted that Jeff Burton is being very aggressive with Jimmie Johnson in a battle for fifth.

"He's being ultra aggressive with the 48," Edwards said. "They're touching, the writing is off his tire."

Restart was with 419 laps to go.

400 to go: Jeff Gordon has pulled away to a 1.9-second lead over Kevin Harvick and Kurt Busch. Jimmie Johnson lurks in fourth, followed by Jeff Burton (who has been aggressive today) and Carl Edwards.

Earlier, there was contact between teammates Dale Earnhardt Jr. and Mark Martin when Earnhardt Jr. tried to get in line. But Martin bumped him a bit and wouldn't let him – Martin is now seventh and Earnhardt Jr. fell back to 10th.

Points leader Harvick goes out: Kevin Harvick, who led most of the early portion of the race, had some sort of brake issue and had to go to the garage. He suddenly slowed on the backstretch while still running in the top five and went straight to the garage. Obviously, his points lead is gone.

For now (380 laps to go), Jeff Gordon leads Kurt Busch, Jeff Burton, Jimmie Johnson and Mark Martin. Carl Edwards, Clint Bowyer, Dale Earnhardt Jr., Brian Vickers and Jamie McMurray round out the top 10.

Caution No. 4: Just after something broke on Juan Pablo Montoya's car, causing him to slam the wall out of Turn 4, Robby Gordon nailed the wall in Turn 4 and brought out the fourth caution.

It seems like what's ailing these cars are possibly melted beads leading to blown right-front tires.

With 365 laps to go, Jeff Gordon leads Kurt Busch, Jeff Burton, Mark Martin and Carl Edwards. Jimmie Johnson is now sixth, with Clint Bowyer, Dale Earnhardt Jr., Brian Vickers and Kyle Busch (moving up quickly) behind him.

Kurt Busch, then Jeff Burton, to the lead: Shortly after the restart, Kurt Busch snuck underneath Jeff Gordon for the lead and Jeff Burton followed him through for second.

But about 15 laps later, Burton got past Busch and has taken the lead.

Meanwhile, Gordon got back by Kurt Busch for second. Behind Burton, Gordon and Busch are Mark Martin and Clint Bowyer, who has moved to fifth.

There are 346 laps left.

Caution No. 5: Marcos Ambrose tapped the left-rear of Greg Biffle's car, sending the No. 16 spinning in Turn 4.

Of note was that Kurt Busch, who was running third, did not pit – but it was a mistake. (Mark Martin also did not pit for some reason).

Steve Addington apologized for the mistake: "Sorry about that dude, I was trying to get the air pressures back up. I just thought you were coming with those guys. My bad."

Kurt Busch: "Well fuck, that bit us last week! It seems like every time a yellow comes out, I'm scared..." (because he doesn't know whether he should pit or not."

Martin leads Busch and Brad Keselowski (pit strategy). Of those who pitted, Jeff Gordon, Ryan Newman and Jeff Burton are up front.

Caution No. 6: Elliott Sadler spun out and was a sitting duck in Turn 4, but NASCAR delayed in calling the caution.

Finally, they called for a yellow flag just as the leaders were about to reach Sadler, who spun his car around just in front of them and nearly made contact.

Kurt Busch seemed upset with the delayed call.

300 laps to go: The clouds are building quickly and it appears the wind is picking up, based on the flags outside.

Busch has fallen back on the latest restart, and Jeff Burton passed Mark Martin at lap 197 for the lead.

Burton now leads Martin, the charging Denny Hamlin, Jimmie Johnson and Ryan Newman. Kyle Busch has come up to sixth, while Kurt Busch has slipped all the way to ninth (and dropping).

Hamlin chasing Burton for lead, passes with 271 laps to go, approaching halfway: It's looking like NASCAR could get to halfway before the scattered showers arrive in the area.

Meanwhile, Denny Hamlin caught leader Jeff Burton and made the pass for the lead.

Mark Martin is third (still on those old tires), followed by Jimmie Johnson, Kyle Busch, Jeff Gordon, Ryan Newman and Dale Earnhardt Jr.

Caution No. 7: Regan Smith and Robby Gordon both had blown tires at about the same time, and they were both slowing on the track as NASCAR displayed the caution.

Denny Hamlin won the race out of the pits, ahead of Jeff Burton, Kyle Busch and Jimmie Johnson.

Mark Martin, whose pit strategy paid off, came out fifth. Jeff Gordon, Joey Logano, Ryan Newman and Clint Bowyer round out the top 10.

There are 258 laps to go on the restart.

Burton to the lead: Jeff Burton has retaken the lead at Martinsville, and the race has past its halfway point (making it official regardless of whether it rains).

Burton leads Denny Hamlin with 235 laps to go, with the ever-present Jimmie Johnson sitting in third. Mark Martin did a bump-and-run on Kyle Busch for fourth, and Jeff Gordon is fifth (Busch fell back to sixth).

Clint Bowyer, Joey Logano, Ryan Newman and Matt Kenseth are the rest of the top 10.

Dale Earnhardt Jr. pitted too close to the wall and lost positions on his pit stop. He is currently 13th.

207 to go: Denny Hamlin snatched the lead away from Jeff Burton with about 220 laps to go – another exchange in the battle of Virginia drivers.

Hamlin still leads Burton by a couple car lengths, and Mark Martin, Jimmie Johnson and Kyle Busch are further back.

Jeff Gordon, Joey Logano, Ryan Newman, Clint Bowyer and Matt Kenseth round out the top 10.

Jamie McMurray just had a tire go down and pitted with 208 laps to go.

Caution No. 8: Elliott Sadler spun out in Turn 2 as a result of contact with Mark Martin.

There are now less than 200 laps remaining in the race, and most of the leaders just came in to take four tires.

After pit stops, Jeff Burton has taken the lead from Denny Hamlin. Mark Martin and Jimmie Johnson are third and fourth, followed by Kyle Busch, Clint Bowyer and Joey Logano.

Dale Earnhardt Jr. fell from 13th to 18th because his team took a sprint rubber out of the left rear.

Caution No. 9: Marcos Ambrose spun – then spun again – with a tire problem, bringing out a caution.

Ambrose, who has ruffled some feathers by being aggressive today, spun out in Turn 4, but NASCAR didn't call a caution and he got going again before the leaders got back around.

But when Ambrose was got to Turn 4 again, he had another spin – this one bringing out the yellow.

There are 181 laps left in the race, and Jeff Burton still leads Denny Hamlin. Mark Martin, Kyle Busch and Jeff Gordon round out the top five.

150 laps to go: Jeff Burton leads Denny Hamlin by about a half-second with 150 laps remaining in the race, which has amazingly made it without a single drop of rain.

Mark Martin, Jeff Gordon and Kyle Busch are the rest of the top five, followed by Ryan Newman, Clint Bowyer, Kurt Busch (who rebounded from a bad pit decision/mistake earlier), Jimmie Johnson and Martin Truex Jr.

Dale Earnhardt Jr. is 13th, around where he has been for much of the day. Tony Stewart is frustrated running in 23rd after challenging for the lead early but deciding to pit out of sequence.

Caution No. 10: David Stremme, who had the most wrecks in the Sprint Cup Series last year according to USA Today, is really making up for lost time after missing the first few races of the season.

Stremme caused another caution at lap 135 (his second of the day), giving him another opportunity to be blamed on Twitter (he's the subject of a well-known hashtag #BlameStremme).

During the caution, Mark Martin was penalized for an equipment violation, which sent him to the tail end of the lead lap. That means he'll restart 24th after the penalty (he was third).

There were 128 laps to go on the restart.

Back and forth they go, laps winding down: Denny Hamlin has the lead with 90 laps remaining after making another pass on Jeff Burton. The two Virginia drivers have been battling back and forth for the lead all day, each holding it several times (and passing one another to get it).

As for the rest? Clint Bowyer is up to third, followed by Kyle Busch, Ryan Newman, Jeff Gordon and Matt Kenseth.

Jimmie Johnson, the heavy favorite for this race, is a surprising 10th, followed by Hendrick teammates Dale Earnhardt Jr. and Mark Martin (who had an earlier penalty).

Caution No. 11: The uber-aggressive Marcos Ambrose has had another incident, spinning rookie Kevin Conway in Turn 4.

After the pit stops, the running order is Denny Hamlin, Jeff Burton, Kyle Busch, Clint Bowyer and Matt Kenseth.

There will be 74 laps to go on the restart.

50 laps to go: Denny Hamlin leads Jeff Burton by 0.6 second, as the two best cars today continue to go at it.

Hamlin's Joe Gibbs Racing teammate Kyle Busch is third, followed by Clint Bowyer and Matt Kenseth.

Jeff Gordon, Ryan Newman, Mark Martin, Martin Truex Jr. and Joey Logano round out the top 10.

Jimmie Johnson still hasn't been his usual self and is in 11th place as the laps wind down.

22 laps to go: Denny Hamlin is clinging to a small lead over Jeff Burton after Burton gave him a bump with about 30 laps remaining.

Now with 20 to go, Hamlin leads by a couple tenths of a second.

Kyle Busch, Clint Bowyer and Jeff Burton are the rest of the top five.

Caution No. 12 and stunning pit call: A major disappointment for Jeff Burton. The Richard Childress Racing driver who had a shot at catching Denny Hamlin had a tire go down and hit the wall, bringing out a caution.

But then, the drama began: Hamlin and Kyle Busch (who were 1-2) pitted for fresh tires, putting them eighth and ninth on the restart.

A late caution just as leader Jeff Gordon took the white flag set up a green-white-checkered finish, which is about to take place.

Gordon leads Ryan Newman, Matt Kenseth and Hamlin (who is up to fourth), followed by Joey Logano.