Yeah McGahee tore 3 ligaments in his knee.
Lattimore also broke his femur which is insane, the thigh bone is one of the toughest bones to break, and then he broke his knee cap and tore the 4th ligament in his knee. Total destruction in that area of the leg...anything that is there to hold that area of the leg together was torn or broken except for the skin.
You just hope he can recover to walk normally again. I don't really know what the expectations are after an injury like this.