The swagger had vanished, and the cocky confidence went with it. A two-week slump sent Kyle Busch spiraling into crankiness despite his hold atop the points standings. With a win Sunday at Infineon Raceway, his mood instantly lifted.

Busch snapped his mini-slump by racing to his first Sprint Cup Series win on a road course with a Toyota that was so bad during practice he was certain he’d wreck.

Instead, he made his series-high fifth visit to Victory Lane this season.