I wonder how much weight is put on the score at that point, too... if it was 38-38, I'd absolutely go for it with 4 minutes left. But, you've held the Bills to 20, so maybe trust the defense a bit more... granted, they're also dealing with the dumb OT coin flip thing as well.
And of course, a touch back is the worst thing that could happen, as you're looking at the Bills needing to drive 99 yards, just to screw the pooch.
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