"I apologize for my thoughtless choice of words that appeared in print earlier today. I meant no harm, and I am sorry to all I offended," the statement read.
Lackey used the word "retarded" in response to being questioned about the behavior of pitchers in the Red Sox clubhouse during the 2011 season. Reports came out after the season of pitchers drinking beer in the clubhouse during games. Boston went 7-20 in September and missed the playoffs by one game.
"Guys having a beer after their start has been going on for the last 100 years. This is retarded," Lackey was quoted as saying.
Lackey will miss the 2012 season after undergoing Tommy John surgery this offseason. He is entering the third season of a five-year, $82.5 million contract with the Red Sox.
Information from The Associated Press was used in this report.