TAMPA, Fla. — Paxton Lynch hustled to throw on a blue blazer outside the Broncos locker room Sunday evening inside Raymond James Stadium. In front of an officially-branded interview backdrop, Denver’s newest quarterback talked to a camera bank about his first NFL pass, his first touchdown pass and the first time he saved the day.

But by the time he got back to his locker, Lynch changed back into a hoodie and sweat shorts. His game in the spotlight ended that quickly. But his job as the Broncos’ No. 1 quarterback still is in play.

The Broncos lost their No. 1 quarterback in a 27-7 victory over the Buccaneers when Trevor Siemian, one of the biggest surprises of the NFL season through one month, sustained an injury to his left shoulder when he was body-slam sacked in the second quarter. Siemian likely separated his shoulder, according to an NFL source, and is considered day-to-day.

Now the Broncos have a quarterback quandary, if not a controversy.

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Bucs defensive tackle Clinton McDonald threw Sieman into the grass for an 8-yard loss with 3:25 remaining in the first half, driving Siemian’s non-throwing shoulder into the ground. The quarterback left the game and was checked out by trainers on Denver’s bench. During the two-minute warning, Siemian was escorted to the locker room.

But he could have returned in the second half, coach Gary Kubiak said. The Broncos chose instead to use Lynch while Siemian watched from the sidelines.

“We felt like we could have put Trevor back in the game,” Kubiak said. “But I really liked the job Paxton did. He was handling himself, handling the team well, so we stuck with him.”

Siemian after the game said his shoulder remained sore. Kubiak declined to give an exact diagnosis on Siemian’s shoulder, saying instead Siemian will have more medical evaluation on Monday. A separated shoulder, or a sprain of the acromioclavicular (AC) joint, ranges in severity.

“I ran another play and figured something was up,” Siemian said of his injured shoulder. “I went over to Greek (Broncos head athletic trainer Steve Antonopulos) and he said to take five, at least.”

Lynch, and the Broncos, are preparing for multiple options. In late August, Kubiak was asked if Lynch, the 26th pick in April’s draft, was on a fast-track to play this season.

“As fast as we can get it,” Kubiak said then. “You never know what’s going to happen.”

At that point, Lynch was the Broncos’ No. 3 quarterback, behind veteran Mark Sanchez and Siemian. The Broncos cut Sanchez just before the start of the season and promoted Siemian as their starting quarterback.

Seven snaps into Lynch’s NFL career, he already wore a season’s worth of grass stains. He was thrown into an ugly, weather delayed game that needed saving, and Lynch looked at home.

In less than two full quarters, Siemian completed 5-of-7 passes for 68 yards. His 11-yard touchdown pass to Demaryius Thomas just 1:34 into the game gave Denver an early lead, but it was set up by an interception by Broncos cornerback Aqib Talib. Denver’s second touchdown, a 1-yard run from C.J. Anderson early in the second quarter, also was defense-aided, after another interception by Talib. Siemian’s two scoring drives used three plays.

“We were really fortunate to turn those into touchdowns,” Siemian said. “When you get those, you want to get touchdowns instead of field goals.”

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After Lynch took over, his first NFL pass went incomplete to Bennie Fowler. But he was 4-for-8 for 47 yards in leading Denver to a late field goal to end the first half. Lynch finished 14-of-24 passing for 170 yards and a touchdown, a 5-yard bootleg pass to Emmanuel Sanders in the fourth quarter that gave the Broncos a 20-point lead.

“I wasn’t sure what was going to happen, just because I didn’t know,” Lynch said. “So whenever the time presented itself, I was definitely going to be ready.”

At the quarter point of the season, the Broncos have a quarterback issue. Again.

“At the end of the day, we have one goal no matter who is in there,” Sanders said. “We can lose me, we can lose DT, we can lose offensive lineman, defensive players. It’s always about getting the win. That’s what we prepare for.”