Not every one-and-done freshman is obvious.
Nobody had Anthony Bennett leaving after a year in the summer of 2013. Ben McLemore wasn't a lock to bounce early either.
Sometimes, when the NBA comes calling, it's tough to turn your back.
In other cases, a prospect might know his opportunity to impress scouts just isn't going to get any better. With Arizona's core frontcourt returning in 2013-14, and highly-touted forward Aaron Gordon on the way in, Grant Jerrett decided to leave after a year, presumably because he knew his role and minutes wouldn't increase.
While each individual could have his own personal reason to leave, these are the freshmen who might surprise later in the year and declare for the draft after just one season.