If Oregon can do it, I don't see why KU can't (or at least come close):
"Oregon's willingness to jump on a player during his senior season gives the Ducks more flexibility than some of the more traditional powers. At Texas, for example, Mack Brown hands out most of the program's scholarship offers during a "junior day" shortly after National Signing Day. With an almost-full class in place nearly a year before signing day, there is precious little room to add a player who blooms as a senior. That may be one reason why the Longhorns -- who desperately needed a feature back this past season -- missed out on a gem from their own state."
"As a senior at Aldine (Texas) High, Thomas committed to LSU. He changed his mind when the Tigers also took commitments from quarterbacks Jordan Jefferson and D.C. Jefferson for the class of 2008. Florida wanted Thomas to come compete with backups Cam Newton and John Brantley behind Tim Tebow. Thomas' list would have been much longer if he'd considered schools that didn't want to bring him in as a quarterback. Thomas picked Oregon, he said, because he loved the Ducks' fast-break offense."