Mariners 2025 Calendar. Espn has the full 2025 seattle mariners 1st half mlb schedule. The seattle mariners’ regular season will begin on thursday, march 27, 2025, and will end on sunday, september 28, 2025.

Made with exceptional quality, the 12×12 calendar also includes bonus pages that feature sept. A printable version of the mariners regular season schedule is available in adobe acrobat format.