DENVER (AP) — A slow start didn't rattle Kyle Sloter, and he's hoping it doesn't faze John Elway or Vance Joseph, either. The undrafted rookie from Northern Colorado shook off two early sacks and a safety to lead Denver on touchdown drives of 98 and 96 yards Thursday night that sparked the Broncos' 30-2 rout of the Arizona Cardinals. That capped a 4-0 preseason for Joseph, the rookie head coach who was peppered with questions afterward about whether Sloter had done enough to earn a roster spot as Trevor Siemian's backup while Paxton Lynch recovers from a sprained right shoulder. He was also asked if three-time Pro Bowl safety T.J.