St. Louis Cardinals first baseman Lance Berkman will be out eight to 10 weeks after surgery Friday on his right knee.
The knee had a partially torn medial meniscus and a cartilage tear, the Cardinals said.
Doctors did not find any damage to the anterior cruciate ligament, which likely would have sidelined Berkman for the rest of the season and possibly ended his career.
Berkman, 36, has played only 13 games this season, hitting .333 with one homer and four RBI.
The 36-year-old was a key member of the 2011 World Series-champion Cardinals, hitting .301 with 31 homers and 94 RBI.
DNA EXPERT BACKS MCNAMEE
A DNA expert testified Friday he matched Roger Clemens' genetic profile to medical waste kept by Brian McNamee, a trainer who claims he injected the former pitcher with performance-enhancing drugs.
Alan Keel, a DNA expert for Forensic Science Associates in California, said at Clemens' perjury trial that he found blood on a cotton ball and material that he believed was puss on another cotton ball that matched the genetic profile of Clemens. He also said he had found a small number of cells on a needle that also matched Clemens.
The Pittsburgh Pirates have designated outfielder Nate McLouth for assignment and called up infielder/outfielder Matt Hague from triple-A Indianapolis. McLouth was hitting .140 with two RBI in 34 games ... The Cleveland Indians have recalled infielder Juan Diaz from double-A Akron while optioning right-handed pitcher Zach McAllister to triple-A Columbus. Diaz was hitting .232 with three home runs and 18 RBI at Akron. McAllister was 4-4 with a 3.96 ERA with the Indians ... The Indians also said right-hander Josh Tomlin would come off the 15-day disabled list and pitch Monday against the Kansas City Royals ... The Colorado Rockies have placed catcher Ramon Hernandez on the 15-day disabled list Friday with a strained left hand. Hernandez is hitting .215 with four homers and 15 RBI. Wil Nieves was called up from triple-A Colorado Springs ... A anticipated, the Chicago White Sox have placed pitcher John Danks on the 15-day disabled list, retroactive to May 20. Danks has soreness in his left shoulder ... Tampa Bay Rays outfielder Brandon Guyer requires shoulder surgery and will miss the rest of the season. Guyer had one homer in seven at-bats before injuring his left shoulder earlier this month.