When the NFL passer rating was initially developed in 1973, the objective was to create a single number that would differentiate between outstanding, excellent, average and poor performance. Below are the metrics the developers of the formula felt best denoted those performances, and which they combined into the passer rating we know today.
CompletionPercentage
Yards perAttempt
TouchdownPercentage
InterceptionPercentage
PasserRating
Outstanding
70%
11
10%
1.5%
133.3
Excellent
60%
9
7.5%
3.5%
100.0
Average
50%
7
5%
5.5%
66.