He's a player that needs to be coached up, bulked up and put in the right system. Rob Ryan: DeMarcWare, Kamerion Wimbley, Derrick Burgeous
This is one of the only reasons I'd be ok with taking him. Ryan has a proven ability to develop pass-rushing OLBs.
From NFL.com Draft Profile:
Weaknesses: Very lean player, likely too thin in the hips to grow into an every-down defensive end. Needs to shed more consistently to prevent plays from getting outside of him. Long legs get in his way at times when trying to change directions quickly. Often gets too focused on scrapping with his blocker instead of getting his eyes in the backfield to find the ball. Did not progress in terms of pass rush moves during his career. Great player off the snap of the ball, but too often allows the offensive tackle to recover because he lacks a move to disengage.
They pretty much nailed every concern I had. Guys like Aldon Smith and Demarcus Ware might have weighed similar to Mingo coming out of college, but it was different weight. Mingo still has the lower body of a track athlete, and I worry if he'll be able to hold-up at the point of attack. I know I know, he's a 3-4 OLB, but that still means he will be taking on TEs, FB, and OTs at times.
More than anything, however, is his inability to develop any significant pass rush moves. Again, this can be taught to an extent, but some of it is just natural. Pass rushing is very much like boxing. You can certainly improve, but some of it is just natural, how you see hands, how you feel body position/lean and how you use yours.
Again, I hope and pray I'm wrong if we draft him, but I don't see it.