Austin Hill, who dominated much of the race, went to block Noah Gragson with four of 113 laps remaining, which opened the door for Mayer to move into the lead.
On the final lap, Allmendinger looked like he would finish behind Mayer but got another run and cut to Mayer’s right as Mayer tried to block him. He clipped Mayer by 0.015 seconds at the finish line to earn his first career win on a superspeedway.
