Seattle Mariners relief pitcher Trent Thornton (Achilles) was placed on the 15-day injured list on Friday. Thornton will miss the rest of the regular season after suffering a torn left Achilles during Thursday's game. He'll finish his 2025 season with a 4.68 ERA, 1.30 WHIP, and a 32/14 K/BB ratio across 42.1 innings of work. This is going to be a lengthy recovery, so Thornton will likely miss most of the 2026 campaign as well. In a corresponding move, right-hander Jackson Kowar was recalled from Triple-A Tacoma.

Pitcher Trent Thornton (leg) went down with a lower-leg injury in the ninth inning of Thursday's game and was carted off the field. He collapsed when coming off the mound, attempting to cover first base on a grounder to the right side, Daniel Kramer of MLB.com reports. It appears that Thornton is scheduled for an MRI on Friday to determine the severity of the injury, which will help the Mariners determine the timeline for Thornton's return to the mound. The incident appeared to be a freak accident, and the Mariners and Thornton are hoping for the best. Thornton owns a 4.68 ERA and a 1.30 WHIP in 42 innings pitched this season.UPDATE: Thornton, who was on crutches in the clubhouse after the game, fears that he suffered a significant left-Achilles injury. He'll undergo an MRI exam on Friday to confirm.

The Seattle Mariners have placed right-handed pitcher Trent Thornton (illness) on the 15-day injured list with appendicitis. In a corresponding move, the Mariners promoted right-handed pitcher Troy Taylor from Triple-A Tacoma. Through his first 15 1/3 innings of work this season, Thornton has held a 5.87 ERA with a 1.30 WHIP. Across this stint, Thornton has struck out 11 batters and served up four walks. He has allowed five long balls. Under the hood, Thornton generated a 6.71 xERA and a .313 xBA, which are both in the fifth percentile among qualified pitchers. Fantasy managers should expect Taylor to have a role as a low-leverage option in the bullpen. Through the opening month of the season, Taylor has tossed three innings of work in the majors but has allowed four runs.

Seattle Mariners reliever Trent Thornton recorded his first save of the season (and of his career) in Wednesday's 5-2 victory over the Rays. He wasn't the first choice in the ninth, but Andres Munoz walked the first two batters he faced and then hit a batter, prompting a pitching change. It is a situation to monitor, as Munoz has also been used in the eighth inning if the situation calls for it, allowing others to record saves, namely Ryne Stanek. Thornton doesn't figure to get many more opportunities, but should the opportunity arise, the 30-year-old has been solid this season, posting a 3.22 ERA, 0.94 WHIP, and 20.3% K-BB%.

The Seattle Mariners acquired right-handed reliever Trent Thornton from the Toronto Blue Jays on Wednesday in exchange for infielder Mason McCoy, according to sources. The move comes after the Blue Jays designated Thornton for assignment last week when Toronto acquired reliever Genesis Cabrera from the St. Louis Cardinals. The 29-year-old hard-throwing right-hander came up as a starting-pitching prospect for the Jays, but he's worked mostly in relief since 2021. He pitched in just 5 1/3 innings at the big-league level for Toronto this year and he has a 4.77 ERA (4.67 FIP), 1.42 WHIP, 98 walks and 249 strikeouts in 260 1/3 major-league innings in the last five years over 108 appearances (35 starts). Thornton won't suddenly have any fantasy value with the move to the American League West.

Toronto Blue Jays relief pitcher Trent Thornton was recalled from Triple-A Buffalo on Sunday. The 28-year-old righty will replace Tim Mayza (shoulder), who landed on the 15-day injured list with a dislocated shoulder, in the Jays bullpen. Thornton, who was just optioned to Triple-A back on July 30, owns a 4.26 ERA, 1.29 WHIP, and 30:15 K/BB ratio over 38 innings with Toronto this year.

Toronto Blue Jays right-hander Trent Thornton has been recalled from Triple-A Buffalo on Saturday. The 28-year-old reliever, who's gone back and forth between the majors and the minors this year, will provide some bullpen depth for the Jays moving forward. He owns a 4.38 ERA, 1.32 WHIP, and 29:15 K/BB ratio over 37 innings (26 appearances) this season. Rookie Max Castillo was optioned to Triple-A in a corresponding move.