← John
MLB Debuts Seen
8 players
Michael Arroyo
Athletics @ Mariners · Sep 6, 2026 · T-Mobile Park
Tyler Locklear
Mariners @ Royals · Jun 9, 2024 · Kauffman Stadium
Connor Phillips
Mariners @ Reds · Sep 5, 2023 · Great American Ball Park
Ryder Ryan
Orioles @ Mariners · Aug 11, 2023 · T-Mobile Park
Cody Morris
Mariners @ Guardians · Sep 2, 2022 · Progressive Field
MW
Marcus Wilson
Orioles @ Mariners · Jun 29, 2022 · T-Mobile Park
Emilio Pagán
Angels @ Mariners · May 3, 2017 · T-Mobile Park
James Paxton
Rays @ Mariners · Sep 7, 2013 · T-Mobile Park