Ellis, the Dodgers' starting catcher, hurt his knee while trying to score from second base on an Andre Ethier single in Saturday's loss to the San Francisco Giants. The team said Ellis had a 20-minute arthroscopic procedure to clean up the medial meniscus in his left knee and will begin his rehabilitation Wednesday.
"A.J. is the kind of guy that from a preparation standpoint has been what we've asked -- to know what he's doing when he puts the fingers down, to know why, to understand our pitchers and all the matchups and everything else," manager Don Mattingly said.
"We ask a lot of our catchers, and A.J. has bought into that. So we're going to miss that, no question. But he's going to be back here tomorrow, and he's the kind of guy that will be doing everything to help Fed and Drew out and still be a part of what we're doing."
The surgery was performed by team orthopedist Dr. Neal ElAttrache.
Blown away yet unsurprised by support of @Dodgers fans. Have total confidence in Dr.ElAttrache and Med Dept to have me back on field ASAP
- AJ Ellis (@AJEllis17) April 8, 2014
Ellis started each of the Dodgers' first seven games before the injury. He underwent the same procedure on the same knee after the 2012 season.
Federowicz appeared in 56 games with the Dodgers last season, hitting four home runs and driving in 16 runs, and he has played in 66 major league games with Los Angeles since making his big league debut in 2011. He was optioned to Albuquerque on March 22 but remained with the big club on its extended roster for the two-game series against the Arizona Diamondbacks in Australia.
Los Angeles kept Butera on the active big league roster because he could be sent to the minor leagues without clearing waivers -- unlike Federowicz.
"I think it just tests our depth," Mattingly said. "We feel like Fed and Drew are capable to get through this stretch with out A.J. ... But I do think we're capable of winning games and doing what we have to do."
The Associated Press contributed to this report.