Quarterback keepers? These five starters risk losing jobs if they bomb in Week 1

The last time Kevin Riley was in such a prominent position, it all slipped away on an October night in 2007 when No. 2-ranked California became another side note in the craziest season of all. The Bears have a special team again, and this time Riley is the starting quarterback from the start—not the freshman who played for an injured starter and took a sack with the clock winding down in a last-second home loss to Oregon State. Now, this is his team. "I'm going to try to make this team the best possible," Riley said. He'd better. Or the guy behind him (Brock Mansion) will. Riley is one of a handful of starting quarterbacks who must deliver from the opening weekend or be replaced. USC Plan A: Freshman Matt Barkley plays well enough that USC doesn't have its first quarterback controversy since Pete Carroll arrived in 2001. Plan B: Aaron Corp, who won the job in the spring, could win the job back any week during USC's "Competition Tuesday&quo...