Also, I have to disagree with the WR being easier than LB and DT coming out of college. There is a reason that WR usually have that "3 year" development until they reach their potential and the same reason that rookie WRs dont make huge impacts in their first seasons. The learning curve, talent gap, jump, and speed of the game is extremely difficult for WRs in transitioning from college to NFL. On the other hand, you do see LBs tend to fair better because they can be put on the field and still managed to make plays without truly understanding the nuances and complications of the game. The same with DTs. They simply need to understand gap assignments rather than recognizing coverages, blitzes, and hot routes.