If his knee is shredded get the kid healthy. Injury should not have happened to begin with. It was poor judgement by the staff. But it appears to be serious.
I refuse to blame the coaches for the King injury. Anderson and Davis were both out, well Anderson was hurt, and at that point no one else on the team had a carry in a game and had probably not received too many practice snaps. Running backs can be injured on any play, just like everybody else on the field, but still, any injury is a fluke. A guy can carry 600 times in his college career and never get a knee injury while another guy gets a career ender on his first carry. You sub for experience, not fear of injury.
With that said, I have a feeling it was a season ending injury and we are just not being told despite Doc's word.