Barkley played in three games last season and had four interceptions, three coming in one quarter of work against the Dallas Cowboys. He was a fourth-round pick last year, and while he might have the potential to develop, Philadelphia would be putting a lot into such an untested quarterback with a team that looks like it is ready to compete with the best in the NFC.
After winning Super Bowl XXXVI, the Patriots kept veteran Damon Huard behind Brady for two more years, although Rohan Davey threw more passes in those seasons. In 2006, the Patriots had Vinny Testaverde around for three games but went with Matt Cassel as the No. 2. Since 2009, the Patriots have had Brian Hoyer and Ryan Mallett as Brady's backups and have not needed them for anything other than mop-up duty.
Does Chip Kelly's system expose the quarterback more? Foles was knocked out of the first Cowboys' game with a concussion.