Lane Kiffin will personally vouch for Matt Barkley’s NFL potential

If any NFL general managers or coaches want to know what USC Lane Kiffin thinks of quarterback Matt Barkley, Kiffin is eager to offer a ringing endorsement. Kiffin, who knows something about the NFL from his stint coaching the Raiders, told ESPNLosAngeles.com that he knows Barkley has all the tools needed to be a great…