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The five most and least consistent QBs of 2017
Which quarterbacks were the most and least reliable last season? Based on their average 2017 swing in week-to-week passer rating, Cam Newton was the least consistent quarterback, while Drew Brees was the most consistent for QBs with at least 10 starts.

Carolina Panthers quarterback Cam Newton was the least consistent QB last season with a 41.1 average week-to-week change in passer rating.

Oakland Raiders quarterback Derek Carr also had an inconsistent season with an average swing of 39.8 week-to-week.

Dallas Cowboys quarterback Dak Prescott's average week-to-week swing of 37.8 last season also landed him a spot on the list.

Jacksonville Jaguars quarterback Blake Bortles had an average swing of 36.7 week-to-week last season.

Kansas City Chiefs quarterback Alex Smith's average week-to-week swing of 36.1 last season secured the final spot on this list of inconsistent QBs.

With an average week-to-week swing of 20.6, Philadelphia Eagles quarterback Carson Wentz earns a fifth-place ranking among the league's most consistent quarterbacks.

Although Indianapolis Colts quarterback Jacoby Brissett earned a spot on the list of most consistent QBs with an average week-to-week swing of 19.8, it is because he consistently underperformed last season.

Pittsburgh Steelers quarterback Ben Roethlisberger's average week-to-week swing was just 19.0 last season.

Atlanta Falcons quarterback Matt Ryan's average week-to-week swing of 16.3 last season earned him the second-place ranking on this list.

New Orleans Saints quarterback Drew Brees had the most consistent season with an average swing of just 15.0 week-to-week.