Mason City Motor Speedway

Third-starting Cody Thompson of Sioux City, Iowa, paced the final 18 circuits of Sunday's 25-lap Karl Chevrolet Premier Late Model Tour main event, earning his first career Late Model victory and $1,500. ... Seventh-starting J.D. Auringer trailed Thompson the final two laps, finishing 1.916 seconds back. ... Alex Smith led the opening handful of laps from the pole before slipping to third. ... Thompson, Brandon Hamburg and Dylan Fitzpatrick won heats. ... The main event lasted 25 minutes with 17 of 19 starters running at the checkers.