Seattle Mariners
Baseball franchise in Washington
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| April 18 2025 | The Mariners lose to the Blue Jays 1-3, with Woo taking the loss. This drops their record to 10-10. |
| 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. |
| April 17 2025 | Mariners win a 11-7 game against the Reds in 10 innings, with Legumina winning and Ashcraft losing |
| 2025 | Multiple players, including pitchers, joined the Mariners roster as active players. |
| April 16 2025 | Mariners achieve a winning record, defeating the Reds 5-3. Miller improves to 1-2, and Muñoz records his seventh save of the season. |
| April 15 2025 | Mariners lose 4-8 to the Reds, with Barlow winning and L.M. Castillo losing |
| April 15 2025 | Mariners' winning streak ends with an 8-4 loss to the Reds, breaking their 4-game win streak and dropping their record to 8-9. |
| 2025 | Austin Vernon (P) joins the Mariners roster for the 2025 season and beyond. |
| April 13 2025 | Mariners win 3-1 against the Rangers, with Gilbert winning and Eovaldi losing |
| April 13 2025 | Promoted to the big leagues for the first time in his career by the Seattle Mariners. |
| April 12 2025 | Mariners continue their winning streak with a 9-2 victory over the Rangers, with Bryce Woo earning his second win of the season. |
| April 11 2025 | Mariners win 5-3 against the Rangers, with Vargas earning the win and Muñoz saving the game. |
| 2025 | Started the season with the Everett AquaSox. |
| April 9 2025 | Mariners win a close game against the Astros 7-6, with DL Hall getting the victory. |
| April 9 2025 | Mariners win 7-6 against the Astros. Lawrence gets the win, and Abreu takes the loss. |
| April 8 2025 | Mariners lose a tight 1-2 game to the Astros in 12 innings. Gusto gets the win, and Hahn takes the loss. |
| 2025 | Logan Gilbert continues as a pitcher for the Mariners entering this year. |
| April 7 2025 | Mariners win 4-3 against the Astros, improving to 4-7. Santos gets the win. |
| April 6 2025 | Mariners lose 4-5 to the Giants, dropping to 3-7. Doval gets the win for the Giants. |
| April 5 2025 | Mariners lose 1-4 to the Giants. Ray gets the win, and Miller takes the loss. |
| 2025 | Significant changes made to the Mariners' broadcast team, including new play-by-play announcers and commentators. |
| April 4 2025 | Mariners lose a long 9-10 game against the Giants in 11 innings. Bivens gets the win, and Vargas takes the loss. |
| April 2 2025 | Mariners win a close 3-2 game against the Tigers. Luis Castillo gets the win, Skubal takes the loss, and Muñoz records his third save. |
| April 1 2025 | Mariners lose 1-4 to the Tigers. Mize gets the win, Gilbert takes the loss, and Kahnle records a save. The team's record falls to 2-4. |
| March 31 2025 | Mariners lose to the Tigers 6-9, with Holton winning (1-0) and Hancock losing (0-1). Hurter recorded the save. Attendance was 15,306, dropping their record to 2-3 with a one-game losing streak. |
| March 31 2025 | Mariners play their first game against the Detroit Tigers in the 2025 season |
| March 30 2025 | Mariners secure a 2-1 victory against the Athletics, bringing their record to 2-2. |
| March 30 2025 | Mariners bounce back with a close 2-1 victory over the Athletics. Woo earns the win, and Muñoz records his second save of the season. |
| 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. |
| March 29 2025 | Mariners lose 2-4 to the Athletics, dropping to a 1-2 record early in the season. |
| March 29 2025 | Mariners suffer another loss to the Athletics 2-4, with Bido getting the win and Miller taking the loss. Miller also recorded a save. Attendance was 35,264, extending their losing streak to two games. |
| 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. |
| March 28 2025 | Mariners suffer a 0-7 loss to the Athletics. Justus Sheffield (Springs) gets the win, while Luis Castillo takes the loss. |
| March 27 2025 | Seattle Mariners win their season opener against the Athletics 4-2, with Thornton recording the win and Muñoz getting the save. Attendance was 42,871, and the team started with a winning streak. |
| March 27 2025 | Seattle Mariners begin their 2025 season with a home game against the Oakland Athletics |
| 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. |
| March 2025 | Early season struggles with fluctuating performance, including multiple win-loss sequences against Athletics and Tigers. |
| 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. |
| March 3 2025 | Played for Colombian national team in World Baseball Classic qualifiers in Tucson, Arizona. Hit a two-run double in Colombia's 8-1 win over China. |
| March 2 2025 | Reliever Seth Martinez was claimed off waivers. Pitcher Jackson Kowar was placed on the 60-day injured list. |
| 2025 | Named the 42nd best prospect in baseball by MLB.com. |
| 2025 | Ranked 98th best prospect in baseball by MLB.com before the season. |
| February 3 2025 | Mariners re-signed Jorge Polanco to a one-year, $7 million contract. Cincinnati Reds traded reliever Casey Legumina to the Mariners for cash. Cade Marlowe and Jhonathan Díaz were designated for assignment. |
| January 21 2025 | Kansas City Royals traded reliever Will Klein to the Mariners for international bonus pool space. Mariners designated pitcher Tyler Jay. |
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This contents of the box above is based on material from the Wikipedia articles List of Seattle Mariners Opening Day starting pitchers, List of Seattle Mariners broadcasters, Seattle Mariners all-time roster, Seattle Mariners minor league players, Seattle Mariners & 2025 Seattle Mariners season, which are released under the Creative Commons Attribution-ShareAlike 4.0 International License.