Brad Keselowski (2) and and Ricky Stenhouse Jr. (17) collide during a NASCAR auto race at Texas Motor Speedway, Sunday, Nov. 3, 2019, in Fort Worth, Texas. (AP Photo/Randy Holt)

Rookie NASCAR Cup driver Matt Tifft says he is focused on trying to determine what caused a seizure at Martinsville Speedway last week before a NASCAR auto race at Texas Motor Speedway, Sunday, Nov. 3, 2019, in Fort Worth, Texas. (AP Photo/Larry Papke)

Chase Elliott talks with a crew member in the garage at Martinsville Speedway In Martinsville, Va., Saturday, Oct. 26, 2019. Elliott had an engine failure less than five minutes into the opening practice for the third round of NASCAR's playoffs. (AP Photo/Steve Helber)

Brad Keselowski (2) wrecks into the front stretch grass during a NASCAR Cup Series auto race at Texas Motor Speedway, Sunday, Nov. 3, 2019, in Fort Worth, Texas. (AP Photo/Randy Holt)

Kevin Harvick, left, poses with local military veteran Joshua Hoscheid, right, in Victory Lane after Harvick won the pole for Saturday's NASCAR Cup Series auto race at Texas Motor Speedway in Fort Worth, Texas, Saturday, Nov. 2, 2019. (AP Photo/Larry Papke)

Kevin Harvick (4) leads the field for the start of a NASCAR auto race at Texas Motor Speedway, Sunday, Nov. 3, 2019, in Fort Worth, Texas. (AP Photo/Larry Papke)