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. They won nine games in a row. The team had an eight-game winning run earlier this month.

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