Has their been many players who didn't have a lot of production in college, but put up ridiculous combine/pro day numbers and became elite players at the pro level?
Not many. There are some players who were underachievers in college that played better in the pros. A few recent ones came from UM, where Randy Shannon was apparently downright horrible at getting his players to play up to their ability. Calais Campbell and Sam Shields are the two biggest examples of that. By and large though, players who aren't productive at the college level do not tend to be productive in the NFL. When you look at production though, you need to look at efficency stats and not just volume stats.
I thought this was an interesting article, the bit from Jeremiah especially explaining why the workouts are so important to the scouting staff. Obviously you want to see production but you have to bear in mind these guys are still young, its easier to coach technique than athletic talent. http://www.nfl.com/draft/story/0ap1...-vs-dion-jordan-best-pass-rusher-in-nfl-draft
