This week's marquee matchup features the NFL's highest-scoring offense versus the dominant defense of the past two seasons.
The question on the mind of 4-0 Denver Broncos fans as they prepare to square off with the 3-1 Atlanta Falcons: who will be under center when the whistle blows?
That doesn't mean he has the green light from coach Gary Kubiak, though.
Siemian conceded that he doesn't know how his arm will feel because he has yet to test it since suffering the injury in last week's game.
If Siemian's shoulder isn't healthy enough to play, though, Kubiak has no qualms about turning to backup Paxton Lynch.