Busch , however , regained the second position on Lap 97 .
Busch , however , narrowed his gap to the leader to a half - second before Keselowski pulled away to a 1.8 - second advantage when Busch ran afoul of lapped traffic .
Busch , however , regained the second position on Lap 97 and narrowed his gap to the leader to a half - second before Keselowski pulled away to a 1.8 - second advantage when Busch ran afoul of lapped traffic .