Seattle Mariners
Baseball franchise in Washington
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| August 17 2025 | The Mariners will participate in the MLB Little League Classic, playing against the New York Mets in a special event. |
| August 13 2025 | Mariners lose to Orioles 3-4, breaking their 8-game winning streak. |
| August 12 2025 | Claimed off waivers by the Seattle Mariners. |
| August 12 2025 | Mariners secure a tight 1-0 victory against Orioles, with Kirby improving to 8-5 and Muñoz recording his 28th save, extending their win streak to 8 games. |
| August 10 2025 | Designated for assignment by the Atlanta Braves. |
| August 10 2025 | Mariners win against Rays 6-3, with Woo improving to 10-6 and Brash recording his 3rd save, extending their win streak to 7 games. |
| August 9 2025 | Mariners continue their strong performance with a 7-4 win against Rays, Evans improving to 6-4 and Muñoz recording his 27th save. |
| August 9 2025 | Mariners defeat Rays 7-4. Evans improves to 6-4, while Boyle falls to 1-2. Muñoz records his 27th save. The team's record reaches 65-53 with a 6-game winning streak. |
| August 9 2025 | The Seattle Mariners will retire jersey number 51 of Ichiro Suzuki in a special ceremony, honoring the longtime outfielder following his induction into the National Baseball Hall of Fame. This will be the fourth jersey number retired in team history. |
| August 8 2025 | Mariners defeat Rays 3-2, with Vargas winning and Brash recording his 2nd save. The team's record reaches 64-53 and their winning streak extends to 5 games. |
| August 7 2025 | Mariners defeat White Sox 4-3 in 11 innings. Kowar achieves a 2-0 record, while Eisert falls to 2-3. The team's record reaches 63-53 with a 4-game winning streak. |
| August 7 2025 | Mariners win an 11-inning game against White Sox 4-3, extending their winning streak to 4 games. Their record improves to 63-53. |
| August 6 2025 | Mariners win against White Sox 8-6, extending their win streak to 3 games with Kirby improving to 7-5 and Muñoz recording his 26th save. |
| August 6 2025 | Mariners defeat White Sox 8-6. Kirby improves to 7-5, while Cannon falls to 4-9. Muñoz records his 26th save. The team's record improves to 62-53 with a 3-game winning streak. |
| August 5 2025 | Mariners defeat White Sox 8-3. Woo secures his 9th win of the season, while Martin takes the loss. Team's record reaches 61-53 with a 2-game winning streak. |
| August 3 2025 | Mariners bounce back with a 5-4 win against Rangers, with Evans improving to 5-4 and Muñoz recording his 25th save. |
| August 3 2025 | Mariners defeat Rangers 5-4, with Evans earning his 5th win and Muñoz recording his 25th save. The team's record improves to 60-53, starting a new winning streak. |
| August 2 2025 | Mariners lose to Rangers 4-6 in an 11-inning game, breaking their winning streak and dropping their record to 59-53. |
| August 2 2025 | Mariners lost to the Rangers 4-6 in an 11-inning game. Curvelo recorded his first win, while Legumina took the loss. The team's record dropped to 59-53 with a 1-game losing streak. |
| 2025 | Players Bryan Woo and Emerson Hancock began their pitching careers with the Mariners. |
| August 1 2025 | Seattle Mariners defeated the Rangers 4-3, with Bazardo achieving his 5th win of the season (record 5-0). The team's record improved to 59-52 with a 2-game winning streak. |
| July 31 2025 | Mariners defeat Rangers 6-0, with Kirby winning his 6th game of the season. |
| July 28 2025 | Mariners defeat Athletics 3-1, with Castillo winning and Sears losing. Team reaches 57-50. |
| 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 |
| July 2025 | July 2025 Mariners schedule includes upcoming games against Royals, Pirates, Yankees, Tigers, Astros, Brewers, Angels, Athletics, and Rangers. |
| 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, Seattle Mariners all-time roster, List of Seattle Mariners broadcasters, 2025 Seattle Mariners season, List of Seattle Mariners minor league affiliates, List of Seattle Mariners Opening Day starting pitchers & Seattle Mariners minor league players, which are released under the Creative Commons Attribution-ShareAlike 4.0 International License.