Sam Mayer Snags ManpowerGroup Sponsorship for Truck Debut
Sam Mayer is attempting his NASCAR Gander Outdoors Truck Series debut in GMS Racing’s No. 21 Chevrolet Silverado later this season, and the team announced Wednesday (July 31) sponsorship for three of those races. The part-time No. 21 will be sponsored by ManpowerGroup in the UNOH 200 at Bristol Motor Speedway (8:30 p.m. ET, Aug. …