The Philadelphia Phillies beat the St Louis Cardinals 12-3 on 22 August 2026. They won again the next day on 23 August 2026. This sealed the series sweep. The Phillies extended their winning streak to nine games. The team had an eight-game winning run earlier this month.

Cardinals prospect Mathews started his third career game. He gave up early runs. In the ninth inning, St Louis fell behind after Philadelphia scored six runs. A walk-off home run ended the game. This victory was sealed. It was the club's first walk-off home run in three years.