The Seattle Mariners earned a 3-1 victory over the Houston Astros on May 12, with closer Andrés Muñoz striking out Yordan Alvarez to seal the win at Daikin Park. The result marks the Mariners’ eighth consecutive win against their division rivals, extending a streak that began last September.
This game highlights the importance of bullpen performance for Seattle as they transition to a six-man rotation with Bryce Miller set to return. With key relievers Matt Brash and Gabe Speier currently on the injured list due to right lat and left shoulder inflammation respectively, and José A. Ferrer temporarily absent on paternity leave, manager Dan Wilson said, “We’re in that spot right now … and getting those outings today was incredible. That’s what good teams do, and when you’re able to kind of step up and be in those situations, those guys delivered.”
Muñoz had not pitched in six days before Monday’s appearance. He faced a high-pressure situation after Jose Altuve singled with two outs in the ninth inning, bringing Alvarez up as the tying run. Muñoz responded by striking out Alvarez with a 93.2 mph changeup—his fastest pitch of the season was also thrown during this at-bat—and lowered his ERA to 5.63.
Other relievers contributed significantly: Nick Davila worked through his third major league outing after being promoted from Double-A Arkansas earlier this month; Cooper Criswell handled three batters efficiently; Eduard Bazardo delivered a scoreless eighth inning despite pitching for the third time in four days.
Seattle’s bullpen now holds an ERA of 3.31, which is third-best across Major League Baseball this season. The team will need continued strong performances from its relief pitchers as it navigates roster adjustments due to injuries and changes in rotation strategy.
Looking ahead, Wilson indicated that consistent contributions from less experienced pitchers will be vital while regular starters adapt to longer outings under the new six-man system.

