The Denver Broncos finished third in scoring defense last season allowing 311 points - 18.3 ppg. They had one shutout - against the Kansas City Chiefs B-team - but against starters the fewest points they allowed was six against the Atlanta Falcons.
The Bronco defense last led the league in scoring in 1989. No team has repeated as the scoring defense leader since the Seattle Seahawks led the league for four straight seasons from 2012 to 2015. Prior to the that the Pittsburgh Steelers led the league in the 2010 and 2011 seasons.