Unlucky 13: Broncos have cycled through 13 starting quarterbacks since Peyton Manning retired

A spring tradition unlike any other: the Broncos' unending search for a franchise quarterback. They are at 13 and counting since Peyton Manning retired following Super Bowl 50. Will this time draft be different? A look at the unlucky 13, which largely explains why the Broncos have missed the playoffs for eight straight years and suffered seven consecutive losing seasons: Trevor Siemian John Leyba, The Denver Post Denver Broncos quarterback Trevor Siemian (13) throws a pass to running back Devontae Booker (23) during the third quarter on Dec. 10, 2017 in Denver, Colorado at Sports Authority Field at Mile High Stadium. Tenure : 2015-17, 13-11 record Highlight : Four-touchdown, 312-yard performance