Pole-sitter Harrison Burton (20) stands next to his car before the NASCAR Xfinity Series auto race at Martinsville Speedway in Martinsville, Va., Friday, April 9, 2021. (AP Photo/Steve Helber)

Harrison Burton (20) and Justin Allgaier (7) lead the field at the start of the NASCAR Xfinity Series auto race at Martinsville Speedway in Martinsville, Va., Friday, April 9, 2021. (AP Photo/Steve Helber)

Justin Allgaier, left, and AJ Allmendinger, front, stand during the national anthem before the NASCAR Xfinity Series auto race at Martinsville Speedway in Martinsville, Va., Friday, April 9, 2021. (AP Photo/Steve Helber)

Harrison Burton, left, talks with Justin Allgaier before the NASCAR Xfinity Series auto race at Martinsville Speedway in Martinsville, Va., Friday, April 9, 2021. (AP Photo/Steve Helber)

Pit crews cover cars during a rain delay in the NASCAR Xfinity Series auto race at Martinsville Speedway in Martinsville, Va., Friday, April 9, 2021. (AP Photo/Steve Helber)