What won the race: Regaining the lead when Ricky Thornton Jr., dropped out, Lonnie Parker of El Mirage, Ariz., notched his first victory at Tucson since 2012 and first ever sanctioned by Championship Dirt Motorsports, taking the checkers ahead of hometown driver Brad Williams. Thornton, of Chandler, Ariz., replacing R.C. Whitwell in Jeff Manka's No. 5, started fourth and led 10 laps before a collision with a lapped car put a hole in his radiator and forced him out.

Key notes: Parker, the Southwest Dirt Racing Association's all-time winningest driver with 65 victories, last won at Tucson on May 26, 2012, in SWDRA action. ... R.C. Whitwell of Tucson, the winner of the previous two CDM events at Tucson, gave up the seat in Jeff Manka's No. 5 to work with Earl Pearson Jr.'s Bobby Labonte Racing team. ... Ricky Thornton Jr. took Whitwell's ride. ... Jason Knoll drove Joey Moriarty's No. 51, finishing fifth. ... Colorado driver Dean Moore won a heat race while debuting a new Victory Circle Chassis, but mechanical problems forced him to retire early from the main event.

Winner's sponsors: Parker's No. 8P is sponsored by Parker Concrete, ATEC Engineering and J&J.

Points chase: Parker moved into the CDM points lead with his victory.

Car count: 13

Next series race: June 6, El Paso Speedway Park (El Paso, TX) $1,200