Seattle Mariners Andrés Muñoz Receives Concerning Update Before MLB Offseason

Seattle Mariners closer Andrés Muñoz left a game against the Colorado Rockies in the ninth inning after suffering a right knee injury. Muñoz tweaked his knee on a ball-four pitch to TJ Rumfield, though the Mariners still managed to secure a 2-1 victory. The closer is scheduled to undergo imaging on his knee to determine the extent of the damage.

This knee issue is reportedly something Muñoz has dealt with in the past, which may explain his career-high 10 blown saves and 4.11 ERA over 57 innings in 2026. A prolonged absence for Muñoz could significantly impact the Mariners' bullpen plans heading into the offseason, especially with the team currently holding just a 0.2% chance of making the postseason.