Boston Red Sox rookie Marcelo Mayer undergoes season-ending wrist surgery, expected to miss three months.

Boston Red Sox rookie Marcelo Mayer will undergo season-ending wrist surgery and is expected to miss three months. The 22-year-old injured his wrist swinging at a pitch on July 23. Despite a cortisone injection, Mayer did not improve and will now focus on recovery for spring training. In 44 games, he batted .228 with four home runs and 10 RBIs.