Complex sentence: Blaney and Cassill pitted for fuel, allowing Kenseth to take the lead for the lap 166 restart, ahead of teammate Biffle and Earnhardt Jr. in third, and maintained the lead for the next ten laps.
Split into simpler sentences: Blaney and Cassill pitted for fuel, allowing Kenseth to become the leader for the lap 166 restart. He was ahead of teammate Biffle and Earnhardt Jr. in third and maintained the lead for the next ten laps.