Pole-sitter Kevin Harvick leads at the halfway point of myAFibRisk.com 400 at Chicagoland Speedway during the third caution of the 267-lap race.
Harvick has only led 10 laps of the opening race of the Chase for the Sprint Cup, with Kyle Busch leading a race high 83.
The first caution came early on Lap 2 when Chase participant Denny Hamlin spun in Turn 4 after making contact with the right rear of AJ Allmendinger. Hamlin, who started 29th, avoided major damage and currently runs 16th.
After Martin Truex led the 39 laps following the restart, Kyle Busch, who started seventh, assumed the lead on Lap 46.
Green flag pit stops began on Lap 53. During the sequence Carl Edwards was penalized for entering pit road too fast. The Southern 500 winner would have an unscheduled pit stop on Lap 114 and now runs 15th.
Kyle Busch retained the lead after pit stops cycles through, but his brother and fellow Chase contender Kurt Busch had to pit on Lap 88 after making contact with the wall.
Kyle Busch and his No. 18 Toyota led through the second set of green-flag stops that began on Lap 104.
On Lap 122 a debris caution came, signaling the longest green-flag run of the 2015 season.
Austin Dillon brought out the third caution on the restart after hitting the outside wall hard on the backstretch.