William Byron holds his Pole Award flag after qualifying for the NASCAR Cup auto race on Saturday, Aug. 31, 2019, at Darlington Raceway in Darlington, S.C.. (AP Photo/Terry Renna)

William Byron takes a selfie after qualifying on the pole for the NASCAR Cup series auto race on Saturday, Aug. 31, 2019, at Darlington Raceway in Darlington, S.C.. (AP Photo/Terry Renna)

Jimmie Johnson holds his daughter Lydia on pit road before qualifying for the NASCAR Cup series auto race on Saturday, Aug. 31, 2019, at Darlington Raceway in Darlington, S.C.. (AP Photo/Terry Renna)

Clint Bowyer waits on pit road for his turn to qualify for the NASCAR Cup Series auto race on Saturday, Aug. 31, 2019, at Darlington Raceway in Darlington, S.C.. (AP Photo/Terry Renna)

Jimmie Johnson watches during qualifying for the NASCAR Cup series auto race on Saturday, Aug. 31, 2019, at Darlington Raceway in Darlington, S.C. (AP Photo/Terry Renna)

Clouds begin to gather over the grandstand at Turn 1 before a NASCAR Cup Series auto race Sunday, Sept. 1, 2019, at Darlington Raceway in Darlington, S.C. (AP Photo/Richard Shiro)

Crews try to dry the track after a rain shower before a NASCAR Cup Series auto race Sunday, Sept. 1, 2019, at Darlington Raceway in Darlington, S.C. (AP Photo/Richard Shiro)

Driver Paul Menard crew members prepare tires before a NASCAR Cup Series auto race Sunday, Sept. 1, 2019, at Darlington Raceway in Darlington, S.C. (AP Photo/Richard Shiro)

NASCAR fans wait out a rain delay before the start of a NASCAR Cup Series auto race on Sunday, Sept. 1, 2019, at Darlington Raceway in Darlington, S.C. (AP Photo/Richard Shiro)

William Byron drives out of Turn 1 during a NASCAR Cup Series auto race on Sunday, Sept. 1, 2019, at Darlington Raceway in Darlington, S.C. (AP Photo/Richard Shiro)

Kurt Busch drives out of Turn 1 during a NASCAR Cup Series auto race on Sunday, Sept. 1, 2019, at Darlington Raceway in Darlington, S.C. (AP Photo/Richard Shiro)

Erik Jones poses for a photo with his trophy after winning a NASCAR Cup Series auto race on Sunday, Sept. 1, 2019, at Darlington Raceway in Darlington, S.C. Jones held off Joe Gibbs Racing teammate Kyle Busch to win the rain-delayed Southern 500 that ended early Monday morning. (AP Photo/Richard Shiro)

Kyle Busch comes in for a pit stop during a NASCAR Cup Series auto race on Sunday, Sept. 1, 2019, at Darlington Raceway in Darlington, S.C. (AP Photo/Richard Shiro)

A member of Kyle Busch's team watches while Busch exits from a pit stop during a NASCAR Cup Series auto race on Sunday, Sept. 1, 2019, at Darlington Raceway in Darlington, S.C. (AP Photo/Richard Shiro)

Racing legend Richard Petty walks down pit row during a NASCAR Cup Series auto race on Sunday, Sept. 1, 2019, at Darlington Raceway in Darlington, S.C. (AP Photo/Richard Shiro)

Aric Almirola drives out of Turn 1 during a NASCAR Cup Series auto race on Sunday, Sept. 1, 2019, at Darlington Raceway in Darlington, S.C. (AP Photo/Richard Shiro)

FILE - In this Aug. 31, 2019, file photo, Jimmie Johnson holds his daughter Lydia on pit road before qualifying for the NASCAR Cup series auto race at Darlington Raceway in Darlington, S.C. Seven-time NASCAR champion Jimmie Johnson says 2020 will be his final season of full-time racing. The winningest driver of his era will have a 19th season in the No. 48 Chevrolet and once again chase a record eighth championship. Johnson made the announcement in a video posted on social media, Wednesday, Nov. 20, 2019.(AP Photo/Terry Renna, File)

FILE - In this Aug. 31, 2019, file photo, Clint Bowyer waits on pit road for his turn to qualify for the NASCAR Cup Series auto race at Darlington Raceway in Darlington, S.C. wyer, popular among his peers and a beloved by fans, would have preferred a proper send-off in his final year as a NASCAR driver. Instead, he’ll settle for a farewell party Sunday at Kansas Speedway. Bowyer is retiring from racing at the end of this season and move into the Fox Sports booth. (AP Photo/Terry Renna, File)