Here's the thing. Campbell is champing at the bit NOW and putting him on IR was more about protecting him from himself than when he will be able to actually get back on the field. This is not about whether Campbell will be ABLE to play, as Breer stated, it is about SHOULD he come back this year. It's all about the nature of MCL tears. There WILL be risk involved regardless of when he comes back,
It is true that Campbell WILL be able to play to a high level with the injury. The question is SHOULD he play and what will be the long-term consequences if he does. We will have up to 4 games to play in the playoffs. As I understand it, there will be no chance the tear will fully heal over the next 2 months. If he shuts down now, the tear will heal and he will have almost a full off season to train and get stronger (he is JUST 21) and more skilled for next season. If he plays and the tear gets worse, he will spend most of the off season rehabbing the knee rather than fully training to be better.
In my view, we take that risk. We have a real opportunity to play for a championship here. Those don't come along very often. You cannot just think "well next year we be in a better position to make a run". Just look at the Commanders, they were at the NFCCG last season, and now they are out of the playoff run with 5 games left to play. You just don't know how a season will run with injuries and the like. EVERY season is different, and you cannot just assume the great locker room we have now will be there next year. There are going to be 15-20 new players in that locker room, and the team will have to find ITS own identity that will be unique to them.
So yes, play Campbell and take that risk. Have him back practicing lightly for the Jets game, then either play him 10 snaps to give him a feel, or not and then have him ready for the playoffs. If we have a bye, all the better, but if we don't it is what it is. But regardless, it is a championship opportunity we cannot pass up.