Dodgers relief pitcher Javy Guerra had surgery on Tuesday on his right knee to repair a small tear of his lateral meniscus. Team physician Dr. Neal ElAttrache performed the surgery in Los Angeles. Guerra is expected to miss four to six weeks. Ken Gurnick of MLB.com has more details:

"Sue said the doc was happy with it," manager Don Mattingly said, referring to trainer Sue Falsone. "There wasn't any other damage. He'll be back playing catch quick. A few days and he'll be throwing again."

The injury is believed to have stemmed from when Guerra was hit in the face by a line drive on April 25 off the bat of Brian McCann of the Atlanta Braves. Guerra contorted to get out of the way and twisted his knee:

Amazingly, Guerra stayed in the game to face three more batters, all of whom singled. He lost his job as closer less than two weeks later.

Since getting demoted from the closer role, Guerra pitched in 12 straight games without allowing a run before finally allowing a run last Saturday at Coors Field in Colorado. But Guerra also had five walks and just four strikeouts in 11 2/3 innings since getting demoted, after five walks and 16 strikeouts in 12 1/3 innings as closer.

Guerra is the 13th different Dodger to be placed on the disabled list this season, and ninth player currently on the DL. Last year at this time, through 56 games, the Dodgers had seven players on the disabled list and also had 13 different players on the DL to that point in the season.