OAKLAND -- A's right-hander Fernando Rodriguez Jr. underwent shoulder surgery Friday to repair a complete tear of his lat tendon.
Rodriguez is expected to be able to begin a throwing program in four months, based on normal practice for such a surgery, which is considered rare.
Dr. Anthony Romeo orchestrated the procedure in Chicago, repairing a tear in the pitcher's latissimus dorsi tendon and performing a debridement on his teres major tendon.
Romero executed the same operation in July 2010 on Giants right-hander Jake Peavy, who was considered to be the first Major Leaguer to fully tear the tendon, which connects the lat muscle to the humerus bone.
Peavy returned to the mound 10 months after the procedure. Rodriguez's surgery was also considered a success.
The 32-year-old A's reliever was placed on the 15-day disabled list July 4 with a strained shoulder, after pitching to a 4.20 ERA in 34 appearances. He also missed all of 2013 and much of '14 while rehabbing from Tommy John Surgery.
Rodriguez is under club control through the 2017 season.
Worth noting
• The A's will wait to see how rehabbing left-hander Sean Manaea responds from a simulated outing on Saturday before plotting out their rotation for next week's four-game series in Kansas City.
• The A's extended their player development contract with the Class-A Beloit Snappers of the Midwest League through 2018, they announced Friday.