Tyler Reddick finished 36th at Chicagoland Speedway on June 30, 2026, after a piece of debris ripped through his No. 45 Toyota’s radiator, allowing Denny Hamlin to stretch his points lead to 44 over the 23XI Racing driver.

What happened at Chicagoland?

On Sunday, June 30, a stray object struck the front of Reddick’s car during the early stages of the race. The impact damaged the radiator, forcing the crew to send the car to the garage for repairs. Reddick managed to get back on track, but the loss of coolant forced him to limp around the circuit, ultimately finishing 36th for the second week in a row.

Why the mechanical woes matter for Reddick’s championship chase

Reddick entered the race with a 129‑point advantage over Hamlin after his win at Watkins Glen on May 10. Since then, four of his last five finishes have been 20th or worse, eroding his cushion. The Chicagoland result pushed his lead down to 44 points, while he still sits 69 points ahead of third‑place Ryan Blaney. Consistent finishes are now essential if he hopes to stay in contention through the playoffs.

How the team responded to the radiator issue

After the debris strike, crew chief James Small directed the pit crew to replace the radiator and flush the cooling system. The repair took roughly 15 minutes, but the car never regained full power. Reddick told TNT’s Mike Tirico, “Hate it for everyone at 23XI. Back‑to‑back weeks of uncertain things coming our way. It stinks, 36th two weeks in a row.” The team emphasized that the car’s chassis and engine remain sound, and they’re focusing on preventing similar incidents.

What’s next for Tyler Reddick?

Reddick heads to Atlanta Motor Speedway on July 12, where 23XI Racing hopes to rebound on the 1.5‑mile oval. A strong run there could halt Hamlin’s momentum and restore confidence after two disappointing outings. The team plans to add extra debris guards and run a tighter radiator seal, hoping to avoid another premature exit.

How this affects the broader Cup Series picture

Hamlin’s expanding lead puts pressure on the rest of the field, especially the likes of Kyle Larson and Chase Elliott, who sit just outside the top five. Reddick’s recent struggles highlight how quickly fortunes can shift in NASCAR, where a single piece of track litter can change the championship narrative.

Key takeaway: Reddick’s radiator failure on June 30 cost him valuable points and widened Hamlin’s lead, but the driver remains within striking distance if he can capitalize at Atlanta.