Add the name of Los Angeles Dodgers right-hander Chris Withrow to the long list of pitchers who needed Tommy John surgery this season.

Withrow was optioned to Triple-A Albuquerque last week in order to clear a roster spot for left-hander Hyun-Jin Ryu's return from the disabled list. However, Withrow had been pitching with some discomfort in his elbow, and he never reported to Albuquerque.

Instead, he went to see Neal ElAttrache, the Dodgers' team physician, who diagnosed him with a torn ulnar collateral ligament and recommended Tommy John surgery. Withrow elected to get a second opinion but is likely lost to the Dodgers for the rest of this season.

"It is a blow because we know it's a power arm and it's a guy who had success for us in our playoff run last year and was pitching well to start this season," Dodgers manager Don Mattingly said. "You saw how I used him this year -- into the eighth inning, in the seventh inning.

"This is a guy we're going to miss."

Withrow had 28 strikeouts and allowed just 10 hits in 21 1/3 innings while compiling a 2.95 ERA for the Dodgers this season. However, he walked 18.