Well, I would pull gaurd on him. I think rubber guard works good on allot of wrestlers since they usually don't posture up when they are in full guard.
Just don't let the wrestling get the better of you. Sue he will have good takedowns, takedown D, top control, and a good base. But there are allot of things that go against him as well. Wrestlers give up arms like crazy. I've been using wrist locks on a wrestlers lately. They know they can usually power out of a shoulder lock or roll with the Gogo, but you can't really do shit about a wrist lock.
I think leg locks work well for wrestlers as well.