Jackson fell two-tenths of a point short in completion percentage from generating the highest attainable rating of 158.3 for a record-setting fourth time in his career.
That mark has been hit 60 times in the regular season or playoffs in the last 75 seasons for a player with at least 15 attempts in a game. Kyler Murray is the only player to hit it this season in Week 2 for Arizona against the Los Angeles Rams.
While passer rating is often referenced, the formula is little understood by even the most avid of NFL fans. It grades players on four metrics - completion percentage, yards per attempt, TD pass percentage and interception percentage - and converts that into a scale from 0 to 158.3 The formula is based on data of how quarterbacks performed from 1960-70 and was adopted for use in the NFL in 1973.
To reach the "perfect" score - more accurately described as the highest attainable rating - a player must complete at least 77.5% of his passes, average at least 12.5 yards per attempt, throw TD passes on at least 11.875% of attempts and have no interceptions.
Jackson came short only in one mark when he completed 17 of 22 passes (77.3%) for 281 yards (12.8 per attempt), five TDs (22.7% of passes) and no interceptions. One additional completion for at least 7 yards would have put Jackson into "perfect" territory for the fourth time in his career.