Every season has roster attrition in college football. This goes beyond the usual graduations or early NFL departures. Guys transfer. Guys simply leave school. Guys just stop playing football due to injuries. It happens. When I last looked at Purdue's football scholarship grid I had them 5 scholarships over the 85 limit once the incoming freshmen get here in the fall. After going through the spring roster I was able to find a few players that have quietly left the program before next season:
J.J. Prince - Prince was in line to be a fifth year senior, but he is no longer on the roster after starting nine games in 2014 at offensive guard.