Yankees closer Mariano Rivera was carted off the field at Kauffman Stadium on Thursday after appearing to suffer a right knee injury shagging fly balls during batting practice.

The Yankees were hitting on the diamond just after 7 p.m. ET as Rivera received attention in the outfield, with manager Joe Girardi among those watching the all-time saves leader be propped onto the back of a flatbed truck and driven around the warning track.

Head athletic trainer Steve Donohue was riding with Rivera, who was gingerly helped into the clubhouse and did not appear able to put pressure on his injured leg.