Overview
- Chase Briscoe held off teammate Christopher Bell to win the eero 400 at Chicagoland Speedway, claiming his first Cup victory of 2026 after a final-round pit undercut.
- Joe Gibbs Racing swept the podium with Bell second and Denny Hamlin third, and seven Toyotas finished inside the top 10, highlighting manufacturer dominance.
- William Byron won both Stage 1 and Stage 2 and led a race-high 94 laps before losing track position during the final green-flag pit cycle that handed the lead to Briscoe.
- Tyler Reddick suffered a punctured radiator that forced long repairs and dropped him to 36th, a result that allowed Hamlin to expand his regular-season lead to 44 points.
- The race marked NASCAR’s return to Chicagoland Speedway since 2019 with a sellout crowd, but organizers faced rain-related parking problems and will move next to EchoPark Speedway in Atlanta.