He said he didn't care who had the hot hand marching down the field (if they do just that), he'll use the QB who best runs the O in the red-zone. I think is Zaire but Kizer was effective at times in the red-zone last year.
Though I'm more of a Zaire fan (both really) I expect Kizer to start but then I assume TX will try to force ND to run the ball against them so we'll see a lot of Zaire after the first series. Just an opinion.