Mariners' Andres Munoz: Undergoing foot surgery

GM Jerry Dipoto said Wednesday that Munoz will undergo foot surgery, Shannon Drayer of Seattle Sports 710 AM reports.

The 23-year-old was a key bullpen piece for Seattle this year with four saves, 22 holds and a 2.49 ERA across 64 appearances, and he'll go under the knife for a foot issue after the loss to the Astros in the ALDS. Munoz surrendered three runs over three innings against Houston, though it's unclear how much, if at all, the injury contributed to his struggles. The specifics of the procedure remain unclear, but the right-hander will have nearly four months to recover ahead of spring training.