Ask him about how disappointing it was to not be able to be at the combine. How is his recovery going from his Jones fracture. ND's pro day is in 4 days I think, imagine he wont be there.
Ask him if he thinks he's the best DE in the draft, and what he thinks of Clowney. Ask him what he thinks it takes to be a good pass rusher, and if he's looking forward to getting after QBs at the next level.
Tell him the Rams may be looking to add talent on the offensive line during the draft. Ask him about going against Yankey, Lewan, (anyone I'm leaving off), and who he thinks is the best linemen he's faced in his college career.
Just some stuff off the top of my head. Haven't been able to listen in a while, but I do enjoy the podcast you guys do. I'll def make sure I tune into this one.