The Mariners placed Munoz on the 15-day injured list Friday with right knee inflammation.
Munoz hasn't pitched since Sunday due to knee problems, and although MRI results on his knee came back negative Tuesday, the Mariners will play it safe and shut their closer down for the year. The 27-year-old didn't quite live up to expectations this season, posting a 4.24 ERA and 1.22 WHIP across 57.1 innings, but he still managed to turn in 28 saves and an 89:24 K:BB. Troy Taylor was called up from Triple-A in a corresponding move.
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Mariners' Andres Munoz: Secures 28th save
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Munoz earned the save in Friday's 5-4 win over the Rockies, allowing one hit while striking out two without a walk in a scoreless ninth inning.
Munoz was called on to close out a one-run lead in the ninth inning and worked around a leadoff single to slam the door. The 27-year-old has held opponents scoreless in seven of eight September appearances, converting four of five save opportunities over that stretch. For the year, he's 28-for-38 in save chances with a 4.11 ERA, 1.19 WHIP and 89:23 K:BB across 57 innings.
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Mariners' Andres Munoz: Suffers blown save Sunday
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Munoz (5-6) blew the save and took the loss Sunday against the Athletics. He allowed two runs on two hits and no walks while striking out one over two-thirds of an inning.
With a one-run cushion, Munoz recorded a pair of outs in the eighth inning but was unable to secure the victory in the ninth frame, serving up a walk-off two-run homer to Lawrence Butler. Sunday marked the hard-throwing right-hander's 10th blown save, as he's endured a down 2026 campaign. In 55 innings, Munoz owns a 4.25 ERA, 1.18 WHIP and 86:23 K:BB with 27 saves.
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Mariners' Andres Munoz: Logs save for second straight day
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Munoz recorded a save against the Rangers on Thursday, walking two batters in a hitless and scoreless inning. He did not record a strikeout.
Seattle stormed back from a three-run deficit by scoring four runs in the bottom of the seventh inning, and Munoz entered for the top of the ninth tasked with holding a one-run lead. He threw only 11 of 25 pitches for strikes and issued consecutive two-out walks to put the tying and go-ahead runs on base, but the veteran closer recovered by getting Jake Burger to hit into a game-ending fielder's choice. Munoz notched a save for the second consecutive day and for the third time over the past five days. He's working on a five-game scoreless stretch, though Thursday's outing snapped a streak of 22 straight relief appearances in which he notched at least one punchout.
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Mariners' Andres Munoz: Reaches 25-save mark
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Munoz pitched a perfect inning and struck out one to earn the save in Sunday's 2-0 win over the Athletics.
Munoz finished the job after Bryan Woo's eight innings of one-hit ball. A rough end to August saw Munoz work in non-save situations for his first two games in September, and he's started the month with 2.2 perfect innings. He's had his share of struggles with a 4.13 ERA, 1.15 WHIP and 83:20 K:BB through 52.1 innings this season, and he has converted 25 of 34 save chances.
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Mariners' Andres Munoz: Blows another save Monday
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Munoz blew the save Monday against Boston, allowing one run on one hit and no walks in 1.1 innings. He struck out three.
It was a rare instance where Munoz was tasked with recording more than three outs, and he took his fourth blown save in his last 10 outings and ninth of the season. The hard-throwing right-hander endured a rough month of August, posting a 5.56 ERA with five saves in nine chances covering 11 appearances, so he's certainly testing Seattle's trust with him in its closer role.
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Mariners' Andres Munoz: Collects 24th save Tuesday
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Munoz walked two and struck out two over a scoreless ninth inning to earn the save in Tuesday's 4-1 win over Philadelphia.
Munoz made things interesting by issuing a pair of walks while protecting a three-run advantage, but he prevented Philadelphia from capitalizing and closed the game with a strikeout of Bryan De La Cruz. The right-hander converted his 24th save in 32 opportunities, though his 4.28 ERA remains unusually high compared to his previous work as Seattle's closer.
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Mariners' Andres Munoz: Takes eighth blown save
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Munoz allowed one run on one hit and struck out two without walking a batter over one inning, taking a blown save in Friday's 6-5 extra-inning win over the Cubs.
Munoz served up the game-tying home run to Alex Bregman in the ninth inning. By all accounts, it's been a bumpy August for Munoz, who has given up seven runs (six earned) over nine innings this month while converting just four of seven save chances. On the year, he's 23-for-31 in save conversions while pitching to a 4.37 ERA, 1.20 WHIP and 75:18 K:BB through 47.1 innings. Munoz doesn't appear to be in any obvious danger of losing the closing job yet, but it would be a positive sign if he could string a few scoreless outings together.
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Mariners' Andres Munoz: Melts down in loss Friday
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Munoz (5-5) blew the save and took the loss in Friday's 10-7 extra-inning loss to the Astros, allowing five runs (four earned) on four hits and no walks with one strikeout while recording two outs in the 10th inning.
Munoz was summoned to protect a two-run lead in the 10th inning and imploded with two outs, allowing a game-tying single before surrendering a three-run walk-off homer to Christian Walker. It was a crushing end to what had been a strong run for the 27-year-old, who entered the contest having yielded only two earned runs over his previous 19 appearances dating back to June 16. On the year, he's a disappointing 21-for-28 in save chances to go along with a 4.47 ERA, 1.24 WHIP and 70:17 K:BB across 44.1 innings.
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Mariners' Andres Munoz: Nails down 21st save
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Munoz struck out two in a clean ninth inning for the save Thursday against the Yankees.
Munoz made quick work of the Yankees on Thursday, landing eight of his 11 pitches for strikes. The star closer has been shaky at times in 2026, but he's been scored upon just twice since June 16 (19 outings). Through 43.2 innings, Munoz has a 3.71 ERA, 1.17 WHIP and 69:17 K:BB with 21 saves in 27 opportunities.
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Mariners' Andres Munoz: Gathers 20th save
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Munoz struck out two in a perfect inning to earn the save in Wednesday's 4-2 win over the Tigers.
Munoz is the 13th pitcher to reach the 20-save mark this season after slamming the door on the Tigers' comeback effort. He had allowed two runs over his previous 3.1 innings, a span that included his first blown save since early June. Munoz is at a 3.89 ERA, 1.22 WHIP and 65:17 K:BB across 41.2 innings this year, and his six blown saves are one fewer than he had during the entirety of the 2025 regular season. Despite the struggles at times this year, he remains safely in the closer role for Seattle.
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Mariners' Andres Munoz: Credited with win after blown save
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Munoz (5-4) blew the save but picked up the win in Sunday's 7-6 win over Minnesota. He allowed one run on two hits and a walk while striking out two over one inning.
Entering with a one-run lead in the ninth inning, Munoz surrendered a game-tying solo homer, though Seattle's offense came through in the bottom of the frame to earn him the win. Sunday marked the 27-year-old's first blown save since June 7, as he has converted 19 of 25 save opportunities in 2026. Overall, Munoz owns a 3.98 ERA, 1.25 WHIP and 63:17 K:BB across 40.2 innings.
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Mariners' Andres Munoz: Secures fourth win
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Munoz (4-4) picked up the win Saturday in a 4-3 victory over the Twins, giving up a hit and striking out two in a scoreless ninth inning.
The closer worked a clean ninth inning in a 3-3 tie and was rewarded for his efforts when Seattle walked it off in the bottom of the frame. It was Munoz's first win since April 22, but he's been plenty effective of late. Over nine appearances and nine innings since the beginning of July, Munoz has produced a 1.00 ERA, 1.00 WHIP and 14:3 K:BB while converting all four of his save chances.
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Mariners' Andres Munoz: Allows run but earns save
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Munoz allowed a run on two hits and a walk while striking out one over one inning to earn the save in Tuesday's 7-6 win over the Dodgers.
Munoz's 13-inning scoreless streak came to an end as the Dodgers applied significant pressure in this outing. Munoz was able to limit the damage to one run, allowing him to pick up his 19th save of the campaign and his third over his last three outings. The veteran reliever has a 3.99 ERA, 1.23 WHIP and 59:16 K:BB over 38.1 innings this season, but he has been much more reliable since mid-June.
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Mariners' Andres Munoz: Sweats out 16th save
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Munoz earned a save against the Angels on Thursday, allowing two hits and walking one batter in one scoreless inning.
Munoz had little margin for error when he took over in the ninth frame, as Seattle held a meager 1-0 lead. The veteran closer allowed the first two batters he faced to reach base and yielded three total baserunners in the inning, but a caught stealing helped him escape without blowing the save. The unsteadiness has been typical for Munoz this season -- he's recorded 16 saves but has also blown five opportunities while posting an uncharacteristic 4.60 ERA ad 1.34 WHIP. Nonetheless, he's locked into the closer role and has now successfully converted each of his past seven save chances.
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Mariners' Andres Munoz: Collects 12th save
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Munoz earned the save Thursday against the Orioles, allowing two walks while striking out one in a scoreless ninth inning.
Munoz was handed a three-run lead in the ninth and made things a bit interesting. The right-hander issued walks to Gunnar Henderson and Samuel Basallo to bring the tying run to the plate, but the right-hander ultimately closed out the victory to secure his 12th save in 17 opportunities. He's recorded consecutive scoreless appearances for the first time since May 22. Munoz now owns a 5.47 ERA, 1.44 WHIP and a 39:13 K:BB across 26.1 innings.
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Mariners' Andres Munoz: Earns save Tuesday
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Munoz allowed a hit and struck out one without walking a batter in a scoreless inning to earn the save in Tuesday's 3-1 win over the Orioles.
Munoz recently battled back tightness following a poor outing Sunday versus the Nationals. He was cleared to pitch earlier Tuesday and converted his 11th save of the season with 17 pitches (13 strikes). The right-hander has had a poor season with a 5.68 ERA, 1.42 WHIP and 38:11 K:BB through 25.1 innings, which also includes five blown saves. However, his inconsistent performance hasn't cost him the closer job yet, and that's unlikely to change immediately since Matt Brash (lat) landed on the injured list last week. If Munoz hits another rough patch, Jose Ferrer, Gabe Speier or Eduard Bazardo would likely be candidates to challenge for save chances.
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Mariners' Andres Munoz: Battling tight back
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Munoz was removed from Sunday's game against the Nationals due to lower-back tightness, Daniel Kramer of MLB.com reports.
The Mariners closer entered for the ninth inning of a 7-1 game since he hadn't pitched in nearly a week, and he allowed both batters he faced to reach before departing with the injury. The initial diagnosis is encouraging since it's not an arm issue, and Munoz should be considered day-to-day heading into Tuesday's series opener versus Baltimore
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Mariners' Andres Munoz: Picks up save No. 10
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Munoz secured the save Monday against the Orioles, allowing no runs on no hits and one walk in the ninth inning. He struck out two.
Baltimore made Munoz work Monday, as the hurler needed 20 pitches (11 strikes) to complete the frame. The hard-throwing right-hander is looking for some consistency as Seattle's closer, considering he's not yet converted four consecutive save opportunities at any point this year. Through 24.1 innings, Munoz has a shaky 5.18 ERA, 1.36 WHIP and 37:10 K:BB with 10 saves in 15 attempts.
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Mariners' Andres Munoz: Charged with blown save
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Munoz was charged with his third blown save of the season Tuesday in a 2-1 loss to the White Sox, allowing two inherited runners to score while striking out two over two-thirds of an inning.
Munoz wasn't charged with a run, but he failed to clean up the mess Luis Castillo left him in the ninth inning. Munoz hasn't been able to stretch a scoreless streak beyond four innings this season in what's been an uneven start to the campaign. He's 8-for-11 in save chances while pitching to a 4.82 ERA, 1.34 WHIP and 32:7 K:BB through 18.2 innings over 20 appearances. Despite his struggles, Munoz remains in the driver's seat for saves in Seattle.
