Exactly

Colorado, USC, Utah, Virginia, do but they mostly play 2-gap. Most College’s play a 2 gap 4-3 because it’s hard to find big guys who can move, it’s easier to find big guys who can eat blocks. That’s why 3 technique Tackles/5 technique De’s are harder to find because they need to have wheels (think McCoy and Suh). In a 4-3 you only need one of those guys, the NT eats a double team and the 3-tech shoots the gap to get inside pressure. But in a single gap 3-4 (like the Packers and Steelers, but not the Patriots or Cowboys) you need two. They’ll line up at 3 or 5 depending on the package

Thus the Packers drafting two this year (both very strong and very fast guys at 290 and 300 lbs). With 4 De’s and 2 NT’s they can rotate to keep the Line fresh (Raji is wasted at De) to be strong up the middle and collapse the pocket, let the let the Mlb’s cover the flat instead of the run and the Olb’s will have a field day cleaning up the mess. It’s organized Chaos.

Ummm, maybe because almost nobody plays a 3-4 in college. Pro teams that run the 3-4 have to make projections on just about every college defensive end and outside linebacker – otherwise they’d be limited to choosing players from about 5 schools.