First off pit road after stops under caution on Lap 429 of Sunday's Jeff Byrd 500, Busch held off pole-sitter Carl Edwards and defending race winner Jimmie Johnson to win his fifth consecutive race in NASCAR's top three national series at the .533-mile short track.
Busch's victory Sunday was his 20th in the Cup Series, his first of the season, his second consecutive at Thunder Valley and his fourth in the past five races there. Busch capped his second consecutive weekend sweep at Bristol, having won Saturday's Nationwide Series event.
