In his next race at the Arizona State Fairgrounds in Phoenix, Rostek took the lead midway through the event, led 58 laps and won his first NASCAR Grand National race. Rostek followed his win with two top ten finishes, finishing third at Marchbanks Speedway and seventh at Montgomery Air Base after leading seven laps and starting on the pole.
In his subsequent contest at the Arizona State Fairgrounds in Phoenix, Rostek assumed the lead partway through the event, dominated 58 laps and secured his first NASCAR Grand National victory. Rostek followed his triumph with two top ten placements, finishing third at Marchbanks Speedway and seventh at Montgomery Air Base after leading seven laps and starting on the pole.