Philadelphia Phillies vs Seattle Mariners is a Major League Baseball regular-season interleague game played at T-Mobile Park in Seattle. The matchup pits the visiting Philadelphia Phillies against the home Seattle Mariners at the Mariners’ retractable-roof ballpark. As part of the MLB 2026 season, the game forms one of the regular-season contests that affect each club’s standings and attracts local and visiting baseball fans to Seattle’s waterfront stadium.
