College success doesn't often translate to the pro's. Kellen Moore was one of the greatest QB's in NCAA history, he didn't get drafted which probably took a big hit to his confidence. With the Combine there is always those few workout warriors who do amazing in every drill and wind up being 6th round picks or even going undrafted. NFL teams use the combine more for the chance to interview players (and have their medical staff check them out) than to watch the underwear olympics.