John Bohnenkamp.

William Byron takes a bite of sweet corn in Victory Lane after winning a NASCAR Cup Series auto race, Sunday, Aug. 3, 2025, at Iowa Speedway in Newton, Iowa. (AP Photo/Bryon Houlgrave)

William Byron thinks Iowa win can build momentum for NASCAR’s playoffs

William Byron was already locked into the NASCAR Cup Series playoffs and was second in the regular-season point standings heading into Sunday’s race at Iowa Speedway. Still, Byron didn’t like how things were going heading into the closing stretch of the regular season. Byron had five finishes of 27th or worse in the last eight races, and coming to a track where he has had success in the past, he wanted to regain some confidence with the playoffs approaching. Sunday’s win at Iowa Speedway helped build confidence for the rest of the season.

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William Byron celebrates after winning a NASCAR Cup Series auto race, Sunday, Aug. 3, 2025, at Iowa Speedway in Newton, Iowa. (AP Photo/Bryon Houlgrave)

William Byron has enough fuel to win NASCAR Cup race at Iowa Speedway

William Byron fought off fuel worries in the closing laps to win the NASCAR Cup Series race Sunday at Iowa Speedway. Byron went the last 144 laps of the 350-lap race without a stop en route to his second victory of the season — he won the Daytona 500 in February — and 15th overall. He also took the season points lead from Hendrick Motorsports teammate Chase Elliott. Byron lost gambles on fuel twice this season, at Michigan and Indianapolis, but held on with the help of a caution-filled final stage to win by 1.192 seconds over pole-sitter Chase Briscoe. Byron led 141 laps. Brad Keselowski was third. He came into the race needing a win to get into the playoffs.

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