ENGLEWOOD - There is no quarterback mystery. That much Gary Kubiak made clear.

There is a quarterback injury, though, and that has created a mystery as to which passer will start for the Denver Broncos this Sunday in their game against the explosive Atlanta Falcons at soon-to-be-renamed Sports Authority Field at Mile High.

“Trevor is our starting quarterback and hopefully he is going to be OK,’’ said Kubiak, the Broncos’ head coach.

Trevor Siemian suffered a sprain in his left, non-throwing shoulder in the first half of the Broncos’ 27-7 win Sunday at Tampa Bay. Siemian was slammed to the natural grass surface by Tampa Bay defensive tackle Clinton McDonald.

Lynch, the Broncos’ rookie quarterback who was selected in the first round of the 2016 draft, came in and played well, engineering two field goal and one touchdown drive.

Initially, the Broncos were leaning toward Siemian missing a week, maybe two. And the injury is such that if it occurred on his right shoulder there would be no way he could play against the Falcons -- and probably not the following game next Thursday at San Diego.

But because the injury was to his non-throwing shoulder, Siemian has a chance to start against the Falcons – even if it means taking few practice reps leading up to the game. The thinking now is if Siemian can go, he’ll start.

It was put to Kubiak: With two games in a five-day stretch, doesn’t it make sense for the 4-0 Broncos to let Siemian fully heal and get Lynch some game experience – and then have Siemian ready to start game 7 against Houston on Oct. 24?

“We’re going to approach every week to get our best players on the field,’’ Kubiak said. “Trevor is our starter, so we’re going to give him every opportunity to get there on Sunday. I was asked, ‘Could he play without a lot of practice?’ That would never be a problem with him because he is very bright in what we’re doing. We’ll push to get there and be as good as we can be against Atlanta. We’ll make decisions once we get to the end of the week.”