The Red Sox lose closer Craig Kimbrel to knee surgery

The Boston Red Sox announced Saturday that closer Craig Kimbrel will have knee surgery.

Kimbrel, who was acquired from the San Diego Padres this past offseason, has a torn meniscus and torn cartilage in his left knee. He reportedly will miss 3-6 weeks.

In 34 appearances this season, he is 1-3 with a 3.55 ERA and 17 saves. He has struck out 50 batters and walked 15 in 33 innings.

Because of the injury, Kimbrel will miss next week's All-Star Game.

The Red Sox acquired closer Brad Ziegler from the Arizona Diamondbacks on Friday night. He will be an option to handle the ninth-inning duties, as will former closer Koji Uehara, who earned the save in Friday's win over the Tampa Bay Rays.