Since the start of the 2015 season, Broncos QBs have only had 13 great games (defined as having a passer rating of 100 or better). Joe Flacco, Peyton Manning and Brandon Allen own one of those apiece. Brock Osweiler owns three of those. Trevor Siemian owns five and now Drew Lock owns two. So in three games shy of six full NFL seasons, the Broncos have gotten stellar play at QB in 13 out of 77 games - 17 percent of the time.
Drew Lock’s two games are his start against Houston in 2019 and yesterday.