As expected, New York Yankees pitcher Mike Mussina has decided to retire, according to a baseball source with knowledge of the situation. Mussina informed the Yankees last week he would give them a decision by the end of this week.

Mussina, who turns 40 next month, spent the last eight seasons with the Yankees after pitching for the Baltimore Orioles for the first 10 years of his career. His 270 wins rank second among all active right-handers, behind only Greg Maddux. In the final start of his career, he pitched six shutout innings against the Boston Red Sox to finish off the first 20-win season of his career.

"I have not talked to him lately," Yankees manager Joe Girardi said Wednesday evening at a Manhattan charity event to benefit his Catch 25 Foundation and Alzheimer's research. "He had led me to believe that that's what was going to happen at the end of the year. I wasn't quite sure in a sense that I believed him because sometimes when you get away from it you really miss it."