Every year, there are a few guys who make general managers feel silly for passing on them. Some just completely slip under the radar, which can be attributed to a poor fit or role in their college system.
It's tough to expect results right away from any rookie. Most teams typically fill out their rotations during free agency and put their rookies in developmental situations.
But some rookies find a way to sneak through the cracks. These are the guys who might not have starred in college, but should make an NBA impact by playing to their strengths.