Probley
Anyone can enter the NBA.
Yes, Cam Newton will enter the 2011 NFL Draft.
Jon Scheyer did not enter the 2010 NBA Draft primarily to complete his senior season at Duke University. He wanted to lead his team in pursuit of another NCAA championship and enhance his skills and experience before transitioning to professional basketball. Additionally, he was focused on finishing his college education and improving his draft stock through another year of collegiate play.
You answer by emailing the NBA.
In 2001
Yes
None
2003
Ray Lewis left the University of Miami to enter the NFL draft in 1996. He was a junior when he left, only recently completing a Bachelor's Degree in Management Studies from the University of Maryland University College (UMUC) in May of 2004.
Yes in 2009
yes but its not to common
Yes but she went undrafted.