CC Sabathia, who had hoped to return around the All-Star break, may not end up pitching for the New York Yankees again this season.

Sabathia suffered a setback on Thursday after waking up with swelling in his right knee.

Joe Girardi admitted that microfracture surgery is a possibility, adding it's "fair to say" he's done for the season.

"He's going to see Dr. [James] Andrews a week from Monday," Girardi said. "[Surgery] is always a possibility when you have a degenerative knee. I'm not exactly sure if he was to have surgery what it would be, that's yet to be determined."