Seattle Mariners
Baseball franchise in Washington
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| 2025 | Cal Raleigh won the Home Run Derby, a competition previously won three times by Ken Griffey Jr. |
| September 26 2025 | Mariners lose 2-3 to the Dodgers, dropping their record to 90-70 |
| September 25 2025 | Mariners continue their strong performance, defeating the Rockies 6-2 and reaching a season-high 90-69 record. |
| September 24 2025 | Mariners defeat the Rockies 9-2, with L. Castillo earning his 11th win of the season. The team's record improves to 89-69. |
| September 24 2025 | The Mariners won the American League West division for the first time since 2001, largely due to a sweep of the Houston Astros in a pivotal series from September 19-21. |
| September 23 2025 | The Mariners clinched a postseason berth for the first time since 2022, achieving their second playoff qualification in four years with a 4-3 victory over the Colorado Rockies. |
| 2025 | Catcher Cal Raleigh broke the record for home runs by a catcher and switch hitter in a season, also surpassing Ken Griffey Jr.'s Mariners single-season home run record. |
| September 21 2025 | Mariners continue their strong performance with a 7-3 win against the Astros, with Gilbert winning and Alexander losing. Team record improves to 87-69. |
| September 21 2025 | Mariners win 7-3 against the Astros, with Gilbert securing the victory |
| September 20 2025 | Mariners defeat the Astros 6-4. Kirby wins, improving to 10-7, and Muñoz records his 37th save. Team record reaches 86-69. |
| September 19 2025 | Mariners defeat the Astros 4-0, with Woo achieving his 15th win of the season |
| September 19 2025 | Mariners shut out Astros 4-0. Woo wins and Brown loses. |
| September 18 2025 | Mariners win 2-0 against the Royals, with L. Castillo pitching and Muñoz closing |
| September 18 2025 | Mariners shut out Royals 2-0. L. Castillo wins and Kolek loses. Muñoz records save number 36. |
| September 17 2025 | Mariners lose to Royals 5-7, with Erceg winning and Brash taking the loss. Their record falls to 83-69. |
| September 16 2025 | Mariners defeat the Royals 12-5, reaching 83-68. Gilbert wins (5-6), Wacha loses (9-12). |
| September 14 2025 | Mariners win 11-2 against the Angels, extending their winning streak to 9 games |
| September 14 2025 | Mariners continue strong performance, winning 11-2 against the Angels, with Kirby securing the victory |
| 2025 | Player enters the Mariners' roster as a Pitcher and a Catcher |
| September 2025 | The Mariners have an upcoming road trip to Tampa Bay Rays, Atlanta Braves, Kansas City Royals, and Houston Astros during September. |
| September 2025 | Home series scheduled against St. Louis Cardinals, Los Angeles Angels, Colorado Rockies, and Los Angeles Dodgers in September. |
| 2025 | Projected roster addition of a utility player, extending the team's roster into the future. |
| 2025 | Cal Raleigh, Randy Arozarena, Julio Rodríguez, Andrés Muñoz, and Bryan Woo selected as All-Stars for the Seattle Mariners |
| 2025 | Players Bryan Woo and Emerson Hancock began their pitching careers with the Mariners. |
| 2025 | Logan Gilbert joins the Seattle Mariners roster as a 1B player and is listed as 2025-Present |
| 2025 | Player joined the Seattle Mariners roster as a pitcher in 2025 |
| 2025 | The Mariners' minor league affiliate structure remains unchanged, continuing to develop talent through their established teams at various levels of play. |
| 2025 | Player joined the Seattle Mariners roster as a pitcher, starting from the present year. |
| 2025 | Player began playing for the Seattle Mariners as a second baseman/shortstop. |
| 2025 | Two players joined the Seattle Mariners roster: an outfielder and a first baseman/designated hitter |
| 2025 | A third baseman is listed as joining the Mariners roster for the present and future. |
| 2025 | Player projected to join the Seattle Mariners roster as a pitcher |
| 2025 | Returned to the Arkansas Travelers to begin the season. |
| 2025 | Started the season with the Single-A Modesto Nuts. |
| 2025 | Named the 74th best prospect in baseball by MLB.com before the season. |
| 2025 | Multiple players, including pitchers, joined the Mariners roster as active players. |
| 2025 | Austin Vernon (P) joins the Mariners roster for the 2025 season and beyond. |
| 2025 | Started the season with the Everett AquaSox. |
| 2025 | Logan Gilbert continues as a pitcher for the Mariners entering this year. |
| 2025 | Significant changes made to the Mariners' broadcast team, including new play-by-play announcers and commentators. |
| 2025 | Logan Gilbert continues his pitching career with the Seattle Mariners. |
| 2025 | 1B Evan White is listed as part of the 2025-Present roster for the Mariners. |
| 2025 | A first baseman/designated hitter joins the Mariners roster. |
| 2025 | Logan Gilbert starts the Opening Day game at T-Mobile Park, representing the current generation of Mariners pitchers. |
| 2025 | The Mariners will partner with Nintendo of America, featuring Nintendo 'racetrack' logo on home game jerseys and Nintendo Switch 2 logo on away game jerseys. |
| 2025 | The Vedder Cup rivalry becomes officially designated, with a trophy to be designed by Eddie Vedder, formalizing the unique connection between the Mariners and Padres. |
| 2025 | Optioned to Triple-A Tacoma to begin the season. |
| 2025 | Jay Buhner, Dave Valle, and Angie Mentink are part of the Mariners broadcasting team this year. |
| 2025 | Named the 42nd best prospect in baseball by MLB.com. |
| 2025 | Ranked 98th best prospect in baseball by MLB.com before the season. |
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This contents of the box above is based on material from the Wikipedia articles Seattle Mariners award winners and league leaders, List of Seattle Mariners broadcasters, Seattle Mariners minor league players, List of Seattle Mariners minor league affiliates, List of Seattle Mariners Opening Day starting pitchers, Seattle Mariners, Seattle Mariners all-time roster & 2025 Seattle Mariners season, which are released under the Creative Commons Attribution-ShareAlike 4.0 International License.