Griffey has left knee surgery, performed by Reds' team doctor
ESPN.com news services
Ken Griffey Jr. on Tuesday had arthroscopic surgery on his left knee, which bothered him for most of the 2008 season.
The surgery was performed by Chicago White Sox outfielder Cincinnati Reds' team doctor.
This season, Griffey had the knee drained twice while he was with the Reds and once after his trade to the White Sox.
Griffey's knee troubles could be the source of his dip in home runs last season. He hit 30 in 428 at-bats in the 2007 season but just 18 in 528 at-bats in 2008.
"There's no question," Dr. Tim Kremchek said, according to the Cincinnati Enquirer. "It affected that push-off leg. How much I don't know. But he was dealing with it all year. There's not much you can do early in the season."
Griffey will be a free agent this offseason, if as expected, the White Sox decline his $16 million option for the 2009 season. He has said he would like to continue playing next season.