Three-time World Series champion and 200-game winner Jon Lester is retiring after a 16-year career.
Lester, 38, told ESPN that his body just isn't up for the rigors of a major league season anymore. He made 30 or more starts 12 times during his career and 28 during his final season split between the Washington Nationals and St. Louis Cardinals.
His résumé includes five All-Star appearances and a 2.51 postseason ERA.
"It's kind of run its course," Lester said. "It's getting harder for me physically. The little things that come up throughout the year turned into bigger things that hinder your performance.