In this image taken from video, New York Yankees' Mariano Rivera, center, grimaces after twisting his right knee shagging fly balls during batting practice before a baseball game with the Kansas City Royals, Thursday, May 3, 2012, in Kansas City, Mo. The Yankees closer was later carted off the field and sent for further tests. (AP Photo/YES Network) MANDATORY CREDIT
KANSAS CITY, Mo. (AP) — New York Yankees manager Joe Girardi says closer Mariano Rivera has a torn right knee ligament, an injury that could potentially end his career.
The 42-year-old right-hander was carted off the field after twisting his right knee shagging flyballs during batting practice Thursday night before the Yankees played the Kansas City Royals.