From 1945 until 1981, Sammy Baugh was the only NFL quarterback to complete 70 percent of his passes in a season.
In one of the more out-of-place early-NFL seasons, Baugh completed 70.3 percent (128 of 182) in eight games for the Redskins in 1945. The league average that year: 45.6.
Finally, in 1982, four years after sweeping rule changes liberated the passing game, Cincinnati's Ken Anderson completed 70.6 percent of his passes.
That stood firm until Drew Brees tied Anderson in 2008 and then surpassed him at 71.2 percent in 2011. Sam Bradford took it to 71.