Would you want to transfer? I was thinking about this today in the morning, in-bettween slamming down on the "snooze" button.
As danzig has pointed out numerous times, Longshore with better decision-making = top NFL prospect. He has the frame, the arm strength, the footwork, the mechanics, etc. down. Of course, I'm sure we all know that there's almost no way Longshore is going to get any more chances to start for this team and he's a senior. Still, though, he could definitely start for a number of other teams that don't run a spread or require a mobile quarterback. If he transfers, he'd have to sit out a year, but then he can play for one more year and try to salvage his NFL dreams. Otherwise, there is no way he'll get drafted - off the top of my head, the only backup QB to ever get drafted was Matt Cassell, and he was backing up Carson Palmer and Matt Leinart.
On the other hand, Tedford has showed unwaivering faith in Longshore, especially last year. To transfer from Cal would be to betray that trust. Plus, I suppose if he wanted to be in the NFL, he could have a superb pro-day and show off his arm and mechanics during drills. A team may be willing to take a flyer (6th/7th round) on him.