The Mariners are set to officially retire Randy Johnson’s number 51 during a pre-game ceremony at T-Mobile Park on May 2, 2026.
Johnson’s number 51 will be the fifth number retired in Mariners history, joining fellow Hall of Famers Ken Griffey Jr. (#24), Edgar Martinez (#11) and Ichiro Suzuki (#51). As with all MLB teams, the Mariners have also retired Hall of Famer Jackie Robinson’s #42.
In addition to Johnson’s Number Retirement Ceremony on May 2, the Mariners will also host Randy Johnson ’80s Jersey Night presented by T-Mobile on May 1 for the first 20,000 fans.