Martin on his mark

Mark Martin has led for 116 out of 158 laps at the Sprint Cup LifeLock.com 400. He joked earlier on his radio that he hasn't even had to push the car full throttle tonight.

"I'm proud to drive it, whatever happens," he said.

Teammate Jimmie Johnson, who led for 31 laps near the start of the race, continues to run second, while Tony Stewart has moved up to fourth after starting 32nd. It's familiar territory for Stewart, who has Top 5 finishes in six of his eight career starts at Chicagoland Speedway.

– Kevin Druley