Closer Koji Uehara is out for the season after suffering a broken bone in his wrist when he was hit by a line drive, the team announced Monday.
X-rays taken Friday night came back negative, but the pitcher was sent back to Boston on Sunday for further tests, which revealed the fracture. The 40-year-old will finish his season at 2-4 with a 2.23 ERA and 0.917 WHIP in 43 appearances.
Boston manager John Farrell told reporters Sunday that recent waiver claim Jean Machi could get the ball in the ninth inning in the meantime. Junichi Tazawa is another option.
The Red Sox are off Monday and open a series against the Marlins on Tuesday in Miami.