Muncy underwent debridement surgery Friday to repair cartilage damage under the medial patella in his left knee.
Muncy was also administered a PRP injection, and the expectation is that he will be a full participant during spring training. The 24-year-old concluded the 2026 season having slashed .230/.296/.387 with nine home runs over 82 contests for the Athletics. Assuming health, Muncy will compete for playing time in the Athletics' infield in 2027.