158.3: Perfect Passer Rating
Passer rating is a statistic calculated using a player’s pass attempts, completions, yards, touchdowns and interceptions, working on a scale from 0 (the worst) to 158.3 (perfect).
In order to finish a game with that stellar 158.3 mark, a quarterback typically has to complete more than 70 percent of his passes (while tossing touchdowns on approximately 10 percent of throws), avoid throwing interceptions and keep yards per attempt above 10.
When setting the minimum amount of throws at 15, Manning ties with Kurt Warner by compiling three perfect games by the statistic.