Peppers and Urlacher will both play through pain. I'm not worried about that. But Soul brings up a good point. It will be interesting to see how well they can play. Pain can be managed. But the body still has to function at a high level too.
I'll bet both guys will be war horses and do fine for us. Even 80% or so of either of those 2 is better than a lot of starters in the NFL.