Head coach Mike Zimmer said Wednesday that Bridgewater is "progressing nicely" through the concussion suffered Sunday against the Rams, but the quarterback remains in the protocol for head injuries, Ben Goessling of ESPN.com reports.

Zimmer's optimism in the aftermath of Bridgewater's concussion wasn't unexpected, but these injuries should be taken on a case-by-case basis. Ultimately, a neurologist outside of the Vikings' sphere will have to clear Bridgewater before he can return, meaning his availability for Sunday's game at Oakland will be up in the air all week. If he's unable to go, Zimmer will entrust the offense in journeyman Shaun Hill.