OAKLAND (AP) — Oakland Athletics rookie right-hander Sonny Gray has undergone surgery on his left thumb.

The procedure Thursday was performed by Dr. Thomas Graham at the Cleveland Clinic Hospital. Gray had a screw inserted to repair a fracture, which Gray sustained on a comebacker from Detroit’s Prince Fielder in Oakland’s Game 5 division series loss Oct. 10.

The A’s say Gray now has full stability in his thumb and he is expected to be fully recovered in time for spring training come February.

Gray went 5-3 with a 2.67 ERA in 12 games and 10 starts this year. He pitched eight scoreless innings in a Game 2 no-decision in which he matched Tigers ace Justin Verlander in a sensational pitcher’s duel on Oct. 5.