Tyler Reddick’s No. 45 to drop to the rear for Cup Series start at Michigan

Tyler Reddick will drop to the rear of the field for the start of Sunday's NASCAR Cup Series race because of unapproved adjustments to his 23XI Racing No. 45 Toyota at Michigan International Speedway. RELATED: Starting lineup | At-track photos: Michigan Reddick is the defending race winner of Sunday's FireKeepers Casino 400 (2 p.m. ET, Prime Video, MRN and SiriusXM NASCAR Radio). He had qualified 12th in the 36-car field, earning that spot after being slowed by a flat tire in practice, an incident that prompted his No. 45 team to work on the rear diffuser. No. 45 crew chief Billy Scott said on the pre-race grid that the team had to replace a worn strake on the diffuser, making other repairs underneath the car to make it race-ready. Reddick enters Sunday's 400-miler ranked sixth in the Cup Series standings. He is still in search of his first victory of the season, having gone six consecutive races without a top-five finish.