This article pretty well summarizes the whole revoked scholarship situation
link
"The National College Players Association, an advocacy group that lobbies for athletes' rights, found an average roster turnover rate of 22 percent among the 65 schools in the 2009 NCAA tournament. That works out to 169 players out of 775 possible returners.
The group includes players who lost scholarships for academic reasons or who sought transfers, but excludes graduating seniors and those who left for the NBA."
Pretty interesting since that's roughly 3 players a year for a 13 man roster.
"Both studies include Kentucky, where seven players on Billy Gillispie's final squad didn't return once John Calipari took over in 2009 and brought his own recruits. Four of those former Wildcats have said publicly they were asked to leave the program.
Kentucky athletic director Mitch Barnhart said that Calipari was honest with the team he inherited.
Players were told up front whether or not they fit into Kentucky's plans. Either "we have a spot for you or we can help you go someplace else," Barnhart said."
Not that KY should be our model.