Here's what's happening in the world of NASCAR with Circuit of The Americas in the rearview and Phoenix (Sun., 3:30 p.m. ET, FS1) up next.

Kyle Larson and William Byron will join Spire Motorsports in the NASCAR Truck Series for select races during the 2025 season.

Larson has started 15 Truck Series races in his career, but just two since 2016. He made his NASCAR top-three series debut in ...

NASCAR travels this weekend to Phoenix Raceway for its first of two visits to the 1-mile track this season. Cup teams will ...