You don't always find out the first stint up though. A demotion back to the minors is not the end of the world for a prospect. There are plenty of good prospects who struggled their first call up, went back down, then came up and figured things out in their 2nd or 3rd stint. IMO, it's probably not that they learn anything new, but that confidence goes a VERY long way in baseball. Sometimes if a guy is hitting really bad, for a long stretch of time, his confidence is shot, and he's never going to break out of that slump until he gets it back. Sometimes sending a guy down to get his confidence back against inferior opposition can be the best possible thing for a young player. I'm in no way saying its that time already for Hicks. But as some have said, if this continues for a while, and the guys who are around him sense that his confidence is shot, then letting him get his confidence back in AAA might be the best thing for both him and the team.