In 1971, passer rating was created as a way to crown the league’s annual passing leader. While the metric sufficed the league’s needs in the 1970s, its flimsiness is extremely apparent in an age with more advanced statistics being used than ever before (for an explanation on why traditional passer rating is not a good metric, read our article here).
To improve upon the nearly 50-year-old system, we created Adjusted Passer Rating. It fixes many of passer rating’s glaring formulaic flaws while also accounting for the era; ratings are based on league average passing statistics in the relevant season. The scaling is more intuitive as well; 0 and 100 are the minimum and maximum values respectively, while 50 is league average.
For more on Adjusted Passer Rating, click here. This article describes the strengths and weaknesses of this metric — it’s important to understand these before misusing Adjusted Passer Rating.
The search tool can be used to find all qualifying quarterback performances in a given year (e.g., search “1994” for all QBs from 1994) or to search for every season of a particular quarterback’s career (e.g., search “Drew Brees” for every season of Brees’ career).