By far the toughest defensive position to project to the college level is cornerback. There are still so many unknowns, especially when it comes to scrutinizing mental toughness. With this being a spot that often requires a position change once a player arrives on campus, often times the college coach or recruiter has not gotten a true picture of just how well the player will fit at the next level because the prospect may have spent most of his time in high school at quarterback, safety, wide receiver or running back.
With that being stated, usually if a player has great feet, excellent speed, but is undersized and played running back or quarterback in high school, he will likely be projected at cornerback in college. However, the demand for this position in terms of size has changed somewhat over the past few years with the influx of bigger wide receivers that seem to dominate the college game today. Size is becoming more of a factor, especially in the red zone, because big wide receivers will take advantage of short corners.