here is one article about it
http://www.al.com/sports/index.ssf/2012/01/what_happened_to_gene_chiziks.html
BIRMINGHAM, Alabama -- Tommy Tuberville did Gene Chizik no favors by leaving behind bare final recruiting classes. Twelve of Auburn's 28 signees in 2008 never even played a down for the Tigers, and only five of the 28 will likely exhaust their eligibility.
Tuberville's last group truly was, as the Opelika-Auburn News recently dubbed it, "The Class That Time Forgot."
So what's that make Chizik's first two classes? Because time is quickly forgetting many of those players, too.
Remarkably, 43 percent of Auburn's 2009 and 2010 signees are no longer on the team, or never joined the program in the first place. That's a brutal percentage, especially as Auburn sits with the SEC's fewest 2012 commitments and two new coordinators who inevitably will weed out some veterans.
Jon Solomon is a columnist for The Birmingham News. Join him for live web chats on college sports on Wednesdays at 2 p.m.The good news for Auburn: It sits at 24 for 24 from the 2011 class still on the team, as far as we know. But 2009 and 2010 are the classes that keep on disappearing.
The missing signees are spread out among positions. They include six offensive linemen, four wide receivers, four defensive backs, three linebackers, three running backs and three defensive linemen.
They're not just fringe players. Forty percent of Auburn's four- or five-star signees listed by Rivals.com from those years are gone. That doesn't include five-star offensive lineman Shon Coleman, who hasn't played while fighting cancer and remains in the program.