Chase Elliott overtook Denny Hamlin for the lead on Lap 260 at Texas, then held on through two overtime restarts to take the win in the Autotrader EchoPark Automotive 400. The win snapped a 42-race winless streak for Elliott.
Denny Hamlin outgunned Martin Truex, Jr. on an overtime restart and held on to win the Toyota Owners 400 at Richmond, earning his second win of the season.
Byron assumed the lead on Lap 51 when Martin Truex Jr. pitted from the lead. Byron led the final 17 laps and cruised to the win in the EchoPark Automotive Grand Prix, his second win of the season.
"I feel good about my performance this year," Blaney said. "I think I'm well on my way to defending my title as Cup champion. And I think Phoenix Raceway has already defended its title as one of the most boring tracks on the schedule."
Kyle Larson dominated throughout the day on Sunday, sweeping the stages and leading 181 laps on his way to the win in the Pennzoil 400 at Las Vegas Motor Speedway.
Ryan Blaney passed Kyle Larson for second on lap 292 and held the position to claim the championship as Ross Chastain took the win at Phoenix. It is Blaney's first Cup championship.
The 2021 CARS Tour Late Model Tour champion from Mooresville, North Carolina, led the final nine of 260 over-scheduled laps and capitalized through two overtime shootouts for his second consecutive O'Reilly victory in recent weeks in Newton, Iowa.
William Sawalich battled back through the field after getting spun and led Toyota with a third-place finish at Iowa Speedway on Saturday evening. Taylor Gray (seventh) put a second Joe Gibbs Racing Supra in the top-10.
The 2023 Cup Series champion from High Point, North Carolina, clocked in a pole-winning lap at 134.191 mph in 23.474 seconds for his third Cup pole of 2026 in Newton, Iowa.