Dillon had luck on his side during his run, with his lone top-10 finish coming in the first race in Atlanta. He advanced in that race after Hamlin crashed out and finished 31st. Dillon twice has finished 20th, including at Dover. He has a best finish of 13th in five career races on the Indy oval.

With a 20th-place finish, Dillon -- the No. 32 and final seed in the In-Season Challenge -- advanced to the final round of the tournament, where he will race Gibbs (who won his matchup against Tyler Reddick) for a $1 million prize in next weekend's Brickyard 400 at Indianapolis.

Hamlin now leads all Cup Series drivers with four wins in 2025. He was leading when rain started to fall after Ross Chastain's late-race crash.