MIAMI -- Marlins reliever Juan Carlos Oviedo, who sprained his right elbow in July, underwent Tommy John surgery on Thursday morning.
The procedure was performed by Dr. James Andrews, and recovery time is typically at least 12 months.
Oviedo, formerly Leo Nunez, felt discomfort a few days before his eight-week suspension was scheduled to end. The right-hander was reinstated from the restricted list on July 23, and placed on the 15-day disabled list that day.
On Tuesday, Oviedo was transferred to the 60-day DL.
Oviedo had been on the restricted list since September 2011, and he was suspended by Major League Baseball in May for playing under a false identity.
After attaining his visa in late May, the reliever returned to Florida from his home in the Dominican Republic and reported to the Marlins' facility in Jupiter, where he worked out and served his suspension before starting a Minor League rehab assignment.
The stint was cut short on July 14, when he exited an appearance for Triple-A New Orleans with soreness in his right elbow. An MRI exam revealed Oviedo had a sprained ulnar collateral ligament in his throwing arm.
From 2009-11, Oviedo had 92 saves as the Marlins' closer. The right-hander is eligible for free agency next season.
Oviedo's surgery came a day after Logan Morrison underwent a successful procedure on his right knee. Morrison tweeted that he had 10 stitches in his knee.