At the end of the day
QBR is adjusted for the strength of opposing defenses. Prescott was pushed into second place by just 0.2 points by Purdy. But his RAW, PAA, EPA, PASS scores were all better (all were #1 in the league) than Purdy. Appreciably better, which means Prescott contributed more to his team's offense than any other quarterback this year, including Mahomes, Jackson and Allen. With just 112 rushing yds/game this should be obvious.
QBR......PAA.....Plays...EPA......PASS....RUN...............................RAW
72.7 | 37.2 | 530 | 76.9 | 66.8 | 9.1 | -10.2 | 1.0 | 73.0 Purdy |
72.5 | 57.0 | 724 | 106.7 | 91.6 | 10.6 | -16.3 | 4.5 | 75.3 Prescott |