Makes me wonder, why not just be blunt and send your 2 strongest corners to pancake Moss before he gets off the line?
If he goes in motion, just drop back into regular coverage.
A few reasons. First, the "pancake attempt" better work every play, which it probably won't. Second, you've just clearly wasted your 2 best corners for each play you do this, and the offense knows it. You're playing 10 v. 9; huge advantage offense.
Even 2 DB a yard off the LOS can't pancake Moss with one hit. They'd have to grab and drive him to do that (that's called holding). Also Moss probably just wouldn't let himself be hit by both DB; he'd step outside or inside off of the line of scrimmage to isolate on one DB. Would it make it easier to contain him? Yeah, but there's very little you can do strategy-wise defensively in the NFL when you are playing 9 v. 10....