Because of its complex range of motion and the weight that’s often distributed through the joint, the knee is vulnerable to injury. The knee is one of the most complex joints in your body.

“Devastating injury — torn ACL, dislocated knee cap, more ligament damage,” Rapoport said during Netflix’s Christmas pregame show Wednesday. “My understanding is, not only is he out this ...

Texans wide receiver Tank Dell suffered a “significant” left knee injury that was said to be a dislocated knee cap on a play Saturday against the Kansas City Chiefs while catching a touchdown.