Kissimmee, FL (Sports Network) - Houston Astros first baseman Lance Berkman underwent arthroscopic surgery on his left knee Saturday morning.

The Astros said the procedure involved removing loose cartilage debris from the knee. There was no indication of ligament or meniscus damage.

Berkman will begin an exercise rehab program immediately and his expected return is still estimated as two to four weeks.

The 34-year-old veteran is no stranger to knee surgery. He had a minor procedure in 1999 on his left knee and another operation in 2004 to repair a torn ACL in his right knee.

Entering his 12th big league season, all with Houston, Berkman said he felt discomfort in the knee after running the bases early in camp. He had his knee drained twice since, but it has remained problematic.

Berkman batted a full-season career-low .274 in 2009 with 25 homers and 80 runs batted in.

03/13 12:10:30 ET