Andres Munoz has spent most of this season living in two different worlds at once.
The Seattle Mariners closer still flashes the kind of stuff that made him one of the most dependable relievers in baseball over the last two seasons, but the results have been far messier. That split was on display again Sunday, when the Mariners lost 8-7 to the Athletics in West Sacramento, Calif.
The defeat was another gut punch: Seattle suffered its second walk-off loss in three games against the A’s, fell to 70-80, and now must win all 12 of its remaining games to avoid finishing below .500 for the first time since the COVID 2020 season. The loss also dropped the Mariners’ playoff chances to 4.2 percent and erased a chance to move within four games of the first-place Houston Astros with 12 games left.
Munoz has been at the center of too many of those late-game swings. He’s now 5-6 with a 4.25 ERA and 10 blown saves, a stunning number for a pitcher who had been so steady in 2024 and 2025.
And yet the underlying data doesn’t look nearly as ugly as the blown-save total.
Munoz has 86 strikeouts in 55.0 innings. He sits in the 100th percentile in whiff rate, the 99th percentile in strikeout rate and the 98th percentile in chase rate. His fastball has been getting back over 100 mph, and that has helped make his slider sharper too.
The walks are still too high - his 10 percent walk rate is a problem - but even that is an improvement over his All-Star seasons in 2025 and 2024, when he posted walk rates of 11.0 and 11.2 percent. His 3.18 FIP also points to some bad luck, since it’s more than a run lower than his ERA.
The bigger issue has been what’s happening when hitters put the ball in play. Munoz has allowed a .304 average on balls in play, well above his career mark of .276.
He’s also given up eight home runs, matching the combined total from his last two seasons. He had 124 appearances in 2024-25 and allowed eight homers across that stretch; this year, he has already surrendered eight in 58 appearances.
Whether that’s something the Mariners can clean up in the offseason, or whether it comes down to better fortune, is still an open question.
What isn’t in question is how painful the blown saves have been, one by one.
On April 22, Munoz gave up a ninth-inning solo homer to Nick Kurtz of the Athletics that tied the game at 4-4, though Seattle still won 5-4 in the bottom of the ninth.
On May 2, after Emerson Hancock struck out 14 over seven innings against the Kansas City Royals, Munoz allowed a game-tying single to Jac Caglianone. The Mariners lost 3-2 in 10 innings.
On May 19, in the piggyback game that let Luis Castillo pitch into the ninth inning, Munoz gave up two hits against the Chicago White Sox. Seattle led 1-0 in the ninth before Chase Meidroth tied it with a single and Andrew Benintendi put the White Sox ahead on an infield hit.
On May 29, he allowed a game-tying fielders choice against the Arizona Diamondbacks in the ninth inning. Seattle still won 7-6 in 10.
On June 7, Munoz had one of his roughest outings. The Mariners were ahead 4-1 in the seventh before the bullpen let two runs in to make it 4-3.
Then in the ninth, Munoz walked two and gave up a walk-off single to Kevin McGonigle. He threw only eight strikes in 19 pitches.
After that, Munoz ran off 11 straight saves before the next one slipped away on Aug. 2 against the Minnesota Twins. He allowed a leadoff homer to Luke Keaschall in the ninth, though Seattle went on to win 7-6 before the trade deadline.
On Aug. 14, the Mariners rallied from down 5-2 to tie the Astros at 5-5 in the eighth, then grabbed a 7-5 lead in the top of the 10th. Munoz then allowed five runs with two outs, including a walk-off three-run homer by Christian Walker.
A week later, on Aug. 21, Seattle beat the Chicago Cubs 6-5 even though Munoz turned a 5-4 lead into a 5-5 tie on an Alex Bregman homer in the ninth.
Then came Aug. 31, when the Mariners blew an 8-5 lead against the Boston Red Sox. Boston scored two in the eighth off Eduard Bazardo, then Munoz surrendered a leadoff triple that Julio Rodriguez misplayed poorly before a sac fly tied it 8-8. Seattle eventually lost in 10.
And on Sunday, it ended with Butler sending a walk-off homer to right field on a fastball that registered 101.1 mph.
The best read on Munoz may be that he has actually pitched better than the numbers show in the second half, even if the results haven’t followed. The defense hasn’t always backed him up, there has been some bad luck along the way, and the home run problem has been real. That part has to get fixed.
The Mariners move on to face the Los Angeles Angels on Monday night at 6:38 p.m. PT, with Kade Anderson set to pitch against Reid Detmers.
In Other News...
White Sox Just Took On A Rotation Risk Fans Can't Ignore
Luis Castillo was supposed to give the White Sox a stabilizing presence after Seattle dealt him before the Aug. 1 trade deadline, but the early returns have been rough enough to keep the move under a microscope. Chicago took on the remaining commitment with the idea that a proven right-hander could help steady the rotation, yet the results since the deal have gone the other way, creating an uneasy contrast with what he had already done in Seattle.
For Mariners fans, the trade always carried some long-term significance because Castillo still has $21.6 million owed in 2027, and the White Sox are now living with that ledger as well as the on-field uncertainty. He had posted a 5.06 ERA in 99.2 innings with Seattle before the deal, so the underlying concern was already there, and the jump to a 7.76 ERA in 29 innings since joining Chicago has only sharpened the question of how much trust this arm can command over the next stretch. [Read more 🡒]
Mariners Risk Wasting Emerson Hancocks Breakout At The Worst Time
Emerson Hancocks 2026 season has given the Mariners something they badly needed: stability in the rotation. After making 25 starts and turning in solid numbers, the right-hander looked like one of the quieter success stories on a staff that has had to manage plenty of moving parts. Then a left adductor strain on Aug. 28 sent him to the injured list, and with the season running short, Seattle no longer has the luxury of a normal starters rehab path.
That is why the conversation has shifted toward a possible relief role for Hancock the rest of the way, even as the Mariners weigh how his return fits alongside Bryce Miller and the rest of the rotation picture. Manager Dan Wilson has made clear that Hancocks health comes first, but the team still has to decide whether there is enough time for the kind of buildup a starter usually needs. For a club trying to maximize every inning in September, the choice could shape more than just this years finish. [Read more 🡒]
Mariners Suddenly Have A Real Andrs Muoz Problem In The Ninth
Andrs Muoz has still piled up enough save chances to give the Mariners confidence that the ninth inning belongs to him for now, but the year has not come nearly as smoothly as the raw totals might suggest. He has turned in a 4.25 ERA and a 1.18 WHIP across 55 innings, and while his fastball has played up and the strikeouts are there, the contact he has allowed has been louder than Seattle would like from its closer.
The result is a bullpen conversation that feels bigger than one rough stretch. Muoz has already blown 10 saves, the most in the majors, and the Mariners now have to sort through what that means for the back end of games even as his $8 million club option looks likely to be picked up. For a team trying to lean on its relief corps in the stretch run, the question is no longer whether Muoz has the stuff to close, but whether Seattle can keep treating the ninth inning as his alone. [Read more 🡒]