I realize this is a morose topic a few weeks out from signing day; however, as I prepare for This Month in MGoBlog History for January 2007, I came across the news of Indiana Safey Jerimy Finch decommiting. He was a 4 star and 37th nationally to Rivals and was set to join a young, untested Michigan secondary. On January 15 he decommitted and promptly committed to Indiana, though he would sign with Florida. Brian declared this the "worst decommitment ever". In hindsight, this wasn't that big a deal. Finch was later named the biggest recruiting bust for IU in the last ten years.
This has made me wonder if Brian's statement is still true. Finch was a highly rated player at a position of need. Given what was to come in the next few years, it probably didn't matter much one way or another. Three others come to mind since then that are probably bigger: Dee Hart, Damien Harris, and George Campbell. Hart and Campbell for what they would have meant to to the coach who recruited them. Hart was supposed to finally be the super athlete to thrive in Rodriguez's backfield. Didn't Campbell refer to himself as the "mayor" and was going to put together a magnificent recruiting class. Harris might be the biggest talent of any of these for Michigan to lose. Interestly but probably not coincidentally, all four of these guys decommitted from a coach who was out the door.
Are there any I am forgetting? Any who could have had a bigger impact on the program or had a lot of success at another program?
EDIT: I should have checked out Touch the Banner right away, but here's a great list of decommits and transfers.