I too doubt he'd be drafted until late. I wouldn't be surprised to see someone take a flyer on him in the 5th-7th round just because he's been productive in the Big Ten. Looking at nfldraftscout.com, he's ranked as the 26th-best DE and runs a 4.82 40, listed at 6-foot-3 1/2 and 256 pounds.
walterfootball.com (idk if that's even a reliable source) has him ranked 24th.
I think if he runs a decent 40 (under 4.80), he will get drafted. I would assume he'll run under that after working out for the combine/pro day. One thing he has going for him is Greg White was doing well last time I checked.