For six years, every season ended the same way for Courtland Sutton — in disappointment. The AFC championship banners hanging on the walls of the Broncos’ indoor practice field and the three Lombardi trophies sitting behind glass in the main lobby served as constant reminders of the franchise’s winning tradition. But, up until Sunday afternoon at Empower Field, Sutton said, “We haven’t held up our end of the bargain.” In his seventh season, one that began with low expectations, Sutton helped change that.