Denver Broncos QB Trevor Siemian is considered a sleeper for the starting quarterback job, according to head coach Gary Kubiak. ‘I think Trevor has a maturity to him. He’s kind of the sleeper, I would say. Trevor knows the offense. He’s very comfortable and can throw the ball, too,’ Kubiak said Monday, May 30. ‘We’ve also seen him make big plays in the preseason games under the lights. I wouldn’t sleep on Trevor to win the job, either.’