EHM The Blue Line

Uh my trainer has suggested that one of my players goings under the knife to correct a recurring injury. Currently he is not injured, but my team is having an off year so I'd like to send him in for it while he's not necessarily needed. Any clue how to do this?

PS: I did search the forum.

You have to wait until he is hurt again I believe, and with that injury. With rehab and surgery..they have to be out with the injury in question.

I kind of thought thats what had to happen, but wasn't positive. Thanks you Batdad.