In American football, passer rating is a measure of the performance of passers, primarily quarterbacks.[2] Passer rating is calculated using a player's passing attempts, completions, passing yards, passing touchdowns, and interceptions. Passer rating in the National Football League (NFL) is measured on a scale from 0 to 158.3, with a higher passer rating reflecting a stronger overall performance.[2] Passer rating is sometimes colloquially referred to as “quarterback rating” or “QB rating”, however the statistic applies only to passing (not to other contributions by a quarterback) and applies to any player at any position who throws a forward pass, not just to quarterbacks.
The NFL did not begin keeping official records until the 1932 season.[3] In addition to the overall NFL passer rating leaders, league record books recognize the passer rating leaders of the American Football League (AFL), which operated from 1960 to 1969 before being absorbed into the NFL in 1970.[4]
The single-season passer rating record is held by Aaron Rodgers who had a rating of 122.5 in 2011 with the Green Bay Packers.[1] Steve Young has led the NFL in passer rating a record six different times while Len Dawson achieved the same feat in the AFL.[5]