William Byron used a flurry of cautions to stretch his fuel over the final 140 laps to win Sunday's NASCAR Cup Series race at Iowa Speedway.

William Byron saves enough fuel to hold off late charges and completes the hat trick of winning at Iowa Speedway in all three national series.

Third-place finisher Brad Keselowski recaps his race at Iowa Speedway, explaining that the way cautions played out hurt his RFK Racing team's strategy.

After a tight battle, Brad Keselowski overtakes William Byron for the top spot with two laps to go in Stage 1.

Green flag is out as Chase Briscoe and William Byron lead a pack of 37 cars to start the 23rd race of the 2025 season.