Who do i start on sunday wes welker or calvin johnson?

Calvin Johnson is out right now (lower back injury) I have Wes Welker and he will probably play the role Kevin Curtis did against the Lions (fast white guy that no one thinks can play) I picked up Curtis the night before the game, and had him playing; (40+ pts) no one saw that one coming! Welker is playing in the slot so the defense can't play bump and run on him. Besides, Cincy will HAVE to double Randy Moss and it still won't matter. If Johnson is healthy, it would be hard to sit him considering the Lions are playing at home an the Bears are really banged up right about now. Might be a Saturday decision. If it is a game time decision on Johnson, go with Welker...