I found the following at another Jets' site and thought you might find it interesting.
Based on historical combine results compiled with success at the NFL level I believe the best measurement to predict success is the 3-cone drill. Its not the only measure of success (Stanford Keglar) as other factors like size and instincts come to play before it. But all else being equal I propose that the 3-cone drill will give an indication of potential success in the NFL.
Historical 3-Cone #s for OLBs:
R.Ninkovich 6.96 (4.91 40)
Curry 6.9 (4.98 40....DE only)
So based on that the best chance of success at OLB appears to be Ingram. Mercilus and Curry seem better suited to DE than OLB. The wildcards are Irvin and Bequette, both who can be had in later rounds (3rd and later).
Nick Perry ran a 7.25 3-cone drill. He is a freak of nature but probably best suited for DE in a 4-3. He screams "Gholston!" to me. imo.