Among QBs with at least 10 games, the next highest is Fiedler's 85.2 in 2002. The last 90+ season was Marino's 90.8 in 1995.
That being said, I believe QB rating is among the most deceiving of all stats; it over-rewards QBs that throw high pct. checkdowns and short yardage slants/screens. Completion percentage is valued much more highly than actual yards; a QB that goes 3/3 for 9 yards will have a higher rating than a QB that goes 1/3 for 35 yards.
Barely... 79.2 vs 78.5
If all those 3 yard passes were on 3rd and 2 then he's clutch. If the other guys 2 incompletions came on 3rd down or in the red zone, or if his 35 yard completion was a dump off or a screen pass then it's not nearly as impressive. I'd like to see the breakdown of QBs if they were only credited for the yards beyond the line of scrimmage the ball was in the air, and receivers only credited for yards after catch.
It's not 100% comprehensive, it's not perfect, but it's better than choosing one measurement and using that alone.
The QB rating is the most comprehensive stat of all. The NFL, a billion dollar venture, is overly simplistic in EVERY other statistical category. The NFL QB rating, due to being somewhat comprehensive, is closer to "right" than any other.
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