William Byron won the first stage of Sunday's eero 400 at Chicagoland Speedway. He also won the second stage. He led 94 of the race's 267 laps; nobody else led more than 51. He finished fourth.
The trophy went to Chase Briscoe, whose 51 laps out front had the good sense to include the final 46. He took the lead in the No. 19 Bass Pro Shops Toyota one last time on Lap 222 and kept Christopher Bell's No. 20 behind him to the line, winning by 0.276 seconds after Bell's car tightened up in dirty air on the last lap. Denny Hamlin ran third in the No. 11, completing the eighth 1-2-3 finish in Joe Gibbs Racing history, most recently done at Nashville earlier this season, in the Cup Series' first race at Chicagoland since June 30, 2019.
It was Briscoe's sixth career Cup victory and his first of 2026, a season he had spent accumulating evidence without a verdict: six top-fives, 11th in the standings, no wins. A week earlier he finished second at Sonoma, 0.357 seconds behind Shane van Gisbergen's weekend sweep. Sunday, the margin pointed the other way. "Honestly did not see this coming," Briscoe said.
The finish was closer than the margin reads. Bell "about won the race in three and four with two or three to go," Briscoe said afterward; "if he gets in my left rear, he instantly wins the race." What saved him was traffic. "There was always another lap car running the bottom or running the middle. I could kind of block him in a sense."
Bell, who broke his wrist in a crash at Michigan on June 7 and raced without a cast this weekend for the first time since, was asked whether the second-place finishes were getting frustrating. "I'm just a second place driver," he said. "That's what I am."
Chicagoland had been off the Cup schedule for 2,562 days, and the return produced the argument for coming back: seven cautions for 43 laps, 28 lead changes, and a winning margin under three tenths of a second. Alex Bowman, who won the track's last Cup race in 2019 for his first career victory, finished fifth in the No. 48 Ally Chevrolet.
The middle of the race belonged to whoever wanted it. Bubba Wallace led 35 laps in the No. 23 and finished sixth. Austin Cindric, Joey Logano, Cole Custer, Todd Gilliland, and JJ Yeley all took turns out front; thirteen drivers led at least a lap.
Which brings the accounting back to Byron. The No. 24 Anduril Chevrolet led six separate times, won the stage that ended at Lap 80 and the stage that ended at Lap 165, and held the lead until Briscoe pitted from second on Lap 215. Byron followed a lap later and came out behind. "We got jumped by the No. 19 there on that last green flag pit cycle," Byron said, "but I just didn't quite have the pace that last run to keep up with him." Bell and Hamlin got past him late on fresher tires. The format pays the stages in points, and it pays Lap 267 in everything else. Byron banked the points. Briscoe collected the everything else.
Hamlin and Tyler Reddick arrived in Joliet separated by one point at the top of the standings, 719 to 718, and spent Sunday resolving the matter in opposite directions. Hamlin took the pole by 0.001 seconds over Kyle Larson, led 30 laps, and finished third. "I just pushed it too far into the wall there with a few laps to go and had to settle for third," he said. Reddick's night detoured through the garage after a splitter stay off another car punched a hole in the No. 45's radiator; the repair cost him 29 laps, and he finished 36th. They did not leave separated by one point. They left separated by 44.
Larson's weekend started 0.001 seconds short and declined from there. He led 23 of the first 48 laps in the No. 5 HendrickCars.com Chevrolet, spun in Turn 4 before the halfway point, and finished 34th. The winless streak that reached Chicagoland at 42 races, already the longest of his Hendrick tenure, now stands at 43.
Rookie Connor Zilisch assembled the weekend's most complete misfortune. On Saturday he led the first 48 laps of the NASCAR O'Reilly Auto Parts Series race from the pole, spun late, and finished 10th. On Sunday his No. 88 Red Bull Chevrolet went out in a chain-reaction wreck when the race was barely two corners old. The results sheet lists him 38th. Laps completed: zero.
Toyotas took seven of the top ten finishing positions, the most for the make in any Cup Series race. "Toyotas are fast," Bell said. "It seems like a monkey can drive them, so it's just disappointing when you get beat by another monkey." Among the seven: ninth place for Corey Heim in the part-time No. 67, whose Cup season now includes a win and a top-10, worth zero points combined. Ford arrived on a 14-race winless run and left on a 15-race one. Ryan Blaney's seventh was the best that make could do.
The Cup Series races at Atlanta on Sunday. Two stages are scheduled. The trophy comes later.