The National Motorsports Appeals Panel upheld penalties assessed to the No. 1 JR Motorsports team after Saturday’s Xfinity Series race at Talladega Superspeedway. JRM driver Sam Mayer had taken the checkered flag in 16th place in Saturday’s United Rentals 250, but his No. 1 Chevrolet failed the post-race height requirement in post-race technical inspection, measuring […]