The operation was performed Tuesday by Dr. James Andrews on Devine's ulnar collateral ligament. A's manager Bob Geren said he was waiting for more details.
Devine has been on the disabled list since the season started. Going into spring training, he was expected to share the closer's role with Brad Ziegler.
Devine went 6-1 with a 0.59 ERA and one save last season. He struck out 49 and walked 15 in 42 games covering 45 2/3 innings.
The A's were in New York to play the Yankees.