Training camp -- QBs
Although Ben Olson enters camp as the starter, this could be a fluid situation if he does not perform well early. The loss of Patrick Cowan for the season because of a knee injury (ACL) suffered in the spring was a jolt to the depth, but it is not as if anyone had such a firm grasp on the position before.
Olson is coming off foot surgery, and needs to be more accurate than when he completed 48.3 percent of his passes last season. In 2006, before a knee injury ended his season in the fifth game, he completed 63.7 percent of his passes.
JUCO transfer Kevin Craft heads into camp as the backup, but could rise or fall depending on his performance. In talking to the coaching staff, they wanted to see better arm strength than Craft demonstrated in the spring. He also didn't have a grasp on the offense, since he enrolled at UCLA days before spring ball began.
Red-shirt Chris Forcier and incoming freshmen Kevin Prince and Nick Crissman will compete for the third string spot, and a lot could depend on how overwhelmed Prince and Crissman get. Prince looked good in summer drills, but it is much different when a defensive line is out there and the offense is being installed day-by-day, like it happens in training camp.
For now, Osaar Rasshan remains at quarterback, but he is not expected to get many, if any, reps.

This is 

GO KEVIN PRINCE!!!!!!!! CRESPI!!!!!
To paraphrase a popular theory:
If you have six quarterbacks, you don't have one.