I think Joe Germane has a definite shot of beating out Sage. I liked Germane as a college kid, but do not like him as a pro.
It was obvious for a while when Germane was with the Rams that Marc Bulger was better and Bulger was the guy sitting behind Germane. Joe just didn't seem comfortable, and to me anytime he plays he doesn't seem comfortable in the pocket. One of those guys who play well when things are slowed down but who can't handle the speed change of the NFL.
Then again its taken a lot of quarterbacks years to adjust to the speed change, the blitz factor, etc in the NFL and some made fine contributions later on....Tommy Maddox finally had the lights turn on for him after being drafted early like what 8 years ago. How long did it take Rich Gannon.
There's no reason to discount the possibility of Germane beating Sage in training camp. May the best QB win. For now, he's insurance in case something incredibly weird and unexpected happens with Griese, I agree with shane13 there.