A statistic that attempts to determine the overall performance of a quarterback. The rating is made up of a series of calculations that take into account the number of completions, attempts, yards, touchdowns, and interceptions that a quarterback has recorded. The highest possible rating an NFL quarterback can have is 158.3; the lowest possible rating is 0.
The quarterback rating is a statistic that combines all of the other passing stats to allow easy analysis of a quarterback's overall performance. Generally, quarterbacks with high completion percentages and more touchdowns than interceptions will have high quarterback ratings, while inaccurate and interception-prone quarterbacks will have very low ratings. The equation tops out at 158.3, which is generally considered a perfect performance by a quarterback. Critics claim that the quarterback rating is an overly complicated equation that makes little sense, particularly given the odd number that makes up the top of the QB rating scale.