Athletics infielder Max Muncy had minor surgery to address cartilage damage in his left knee and received a platelet-rich plasma injection. He’s expected to be ready for spring training, but the upcoming season could be pivotal: Muncy has yet to establish himself as a major leaguer and will compete for a utility role after opening 2026 as Oakland’s starting third baseman.

By the Numbers
  • .230/.296/.387: Muncy’s batting line across 284 plate appearances in 2026.
  • 9 home runs in 2026; 32% strikeout rate and a walk rate below 8%.
  • 12 of his 18 career home runs have come against fastballs.
  • 1 minor league option year remains.
Yes, But

The knee procedure is considered minor and isn’t expected to disrupt Muncy’s offseason. Still, his offensive approach and defensive fit remain concerns: he has struggled against secondary pitches and has not settled into a position.

State of Play
  • Muncy is expected to be fully ready for the start of camp.
  • Oakland used him mostly as a designated hitter late in the season and also tried him in the corner outfield.
  • He’ll compete for a utility job under a new baseball operations leader, Taylor Smith.
Bottom Line

The knee issue appears manageable; Muncy’s bigger challenge is proving he can hit consistently and defend well enough to earn a lasting role in Oakland.