The Vikings opened the season with Sam Bradford at quarterback, went to Case Keenum after Bradford’s Week One injury, and may go to Teddy Bridgewater if he shows in practice that he’s all the way back from last year’s injury. And the Vikings’ receivers don’t particularly care who’s throwing the ball. That’s the word from Vikings receiver Stefon Diggs, who said on PFT Live that none of the receivers spend any time thinking about who’s playing quarterback.