A stretch of bad luck has cost William Byron the Cup Series points lead, and beginning Sunday at Indy (2 p.m. ET, TNT), he hopes to turn things around.

Ty Gibbs and Ty Dillon set to clash for inaugural In-Season Challenge championship, $1M prize Sunday at Indianapolis (2 p.m. ET, TNT Sports).

Chase Briscoe earned the NASCAR Cup Series pole for Sunday's Brickyard 400 crown-jewel race at Indianapolis (2 p.m. ET, TNT Sports).