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07/29/11 2:28 PM ET

Monasterios undergoes Tommy John surgery

LOS ANGELES -- Dodgers pitcher Carlos Monasterios underwent Tommy John elbow reconstruction this month and will be sidelined about a year.

Monasterios, a 25-year-old right-hander, last year became only the second Rule 5 Draft pick to stick with the Dodgers for an entire season. He went 3-5 with a 4.38 ERA, enjoying his most success as a reliever despite making 13 starts.

Monasterios made five Spring Training appearances, going 0-1 with a 6.75 ERA before being optioned to Triple-A Albuquerque, where he started one game before being on the disabled list April 9, with right elbow inflammation and spent three months rehabbing before the decision was made to operate.

Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.