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02/25/08 3:40 PM ET

Lidge's right knee surgery successful

Phillies closer could resume baseball activities next week

CLEARWATER, Fla. -- Phillies closer Brad Lidge had arthroscopic surgery on his right knee Monday to repair a torn meniscus, and everything went well, the club said.

Lidge, 31, is expected to be sidelined for three to six weeks, and remains optimistic that he'll be ready for Opening Day, March 31 against the Nationals. If Lidge starts the season on the disabled list, setup man Tom Gordon will serve as closer.

"We went in and cleaned out 15 to 18 percent of it," Phillies trainer Scott Sheridan said. "That leaves him a good 80 percent of the meniscus, which is nice. For us, this was really the best-case scenario that this was the only thing [wrong]. The other side of the knee that he had repaired was fine."

Lidge limped off the field Saturday after catching his spike on the mound during batting practice. He had surgery on the same knee in October, but cartilage was repaired rather than removed.

"Ideally, if everything went right, I wouldn't miss any of the season because that would be four weeks," Lidge said on Sunday. "But that will be based on how it feels."

Lidge is expected to rejoin the Phillies on Tuesday and could resume baseball activities next week.

Ken Mandel is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.