At a certain point a little soreness is just that, and you just play through it. I am entirely in favor of him skipping a preseason practice or two or going light on the drills if the knee is uncomfortable -- why press it for nothing? But its a long season, and I think its pretty clear the knee is not going to be perfect every night. So if its just a little swelling again, get out there, play through it full speed for 20min or whatever the starters give this early in the preseason, then take a seat and watch the rooks and FAs play the rest of the night. Give him mroe confidence, give us more confidence.