My Reference: Passer Rating

Passer rating (also known as quarterback rating, QB rating, or passing efficiency in college football) is a measure of the performance of passers, primarily quarterbacks, in American football and Canadian football. There are two formulae currently in use: one used by both the National Football League (NFL) and Canadian Football League (CFL), and the other used in NCAA football. Passer rating is calculated using a player's passing attempts, completions, yards, touchdowns, and interceptions. Since 1973, passer rating has been the official formula used by the NFL to determine its passing leader. Passer rating in the NFL is on a scale from 0 to 158.3. Passing efficiency in college football is on a scale from âˆ'731.6 to 1261.6.

History

Football: Passer Rating - A description of what the Passer Rating stat is and how it is calculated, including an example. NFL.com page: http://www.nfl.com/help/quarterbackratingformula Passer Rating Calculator: http://bruc...

Before the development of the passer rating, the NFL struggled with how to crown a passing leader. In the mid-1930s, it was the quarterback with the most passing yardage. From 1938 to 1940, it was the quarterback with the highest completion percentage. In 1941, a system was created that ranked the league's quarterbacks relative to their peers' performance. Over the next thirty years the criteria used to crown a passing leader changed several times, but the ranking system made it impossible to determine a quarterback's rank until all the other quarterbacks were done playing that week, or to compare quarterback performances across multiple seasons. In 1971, NFL commissioner Pete Rozelle asked the league's statistical committee to develop a better system. The committee was headed by Don Smith of the Pro Football Hall of Fame, Seymour Siwoff of the Elias Sports Bureau, and NFL executive Don Weiss. Smith and Siwoff established passing performance standards based on data from all qualified pro football passers between 1960 and 1970, and used those data to create the passer rating. The formula was adopted by the NFL in 1973.

NFL and CFL formula

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The NFL passer rating formula includes four variables: completion percentage, yards per attempt, touchdowns per attempt, and interceptions per attempt. Each of those variables is scaled to a value between 0 and 2.375, with 1.0 being statistically average (based on league data between 1960â€"1970). When the formula was first created, a 66.7 rating indicated an average performance, and a 100+ rating indicated an excellent performance. However, passing performance has improved steadily since then and in 2017 the league average rating was 88.6.

The four separate calculations can be expressed in the following equations:

$a=\left({{\text{COMP}} \over {\text{ATT}}}-.3\right)\times 5$

$b=\left({{\text{YDS}} \over {\text{ATT}}}-3\right)\times .25$

$c=\left({{\text{TD}} \over {\text{ATT}}}\right)\times 20$

$d=2.375-\left({{\text{INT}} \over {\text{ATT}}}\times 25\right)$

where

ATT = Number of passing attempts

COMP = Number of completions

YDS = Passing yards

TD = Touchdown passes

INT = Interceptions

If the result of any calculation is greater than 2.375, it is set to 2.375. If the result is a negative number, it is set to zero.

Then, the above calculations are used to complete the passer rating:

${\text{Passer Rating}}=\left({(a+b+c+d) \over 6}\right)\times 100$

NCAA formula

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The NCAA passing efficiency formula is similar to that of the NFL passer rating, but does not impose limits on the four components:

${\text{Passer Rating}}_{\text{NCAA}}={(8.4\times {\text{YDS}})+(330\times {\text{TD}})+(100\times {\text{COMP}})-(200\times {\text{INT}}) \over {\text{ATT}}}$

where

ATT = Number of passing attempts

COMP = Number of completions

YDS = Passing yards

TD = Touchdown passes

INT = Interceptions

The NCAA passer rating has an upper limit of 1,261.6 (every attempt is a 99-yard completion for touchdown), and a lower limit of âˆ'731.6 (every attempt is completed, but results in a 99-yard loss). A passer who throws only interceptions will have a âˆ'200 rating, as would a passer who only throws completed passes losing an average of 35.714 yards.

Advantages

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In 2011, Sports Illustrated published an article by Kerry Byrne of Cold Hard Football Facts highlighting the importance of passer rating in determining a team's success. "Put most simply," the article states, "you cannot be a smart football analyst and dismiss passer rating. In fact, it's impossible to look at the incredible correlation of victory to passer rating and then dismiss it. You might as well dismiss the score of a game when determining a winner. [...] Few, if any, are more indicative of wins and losses than passer rating. Teams that posted a higher passer rating went 203â€"53 (.793) in 2010 and an incredible 151â€"29 (.839) after Week 5." Byrne made an expanded defense of the passer rating and its importance for the Pro Football Researchers Association in 2012. The study noted that of the eight teams since 1940 to lead the league in both offensive passer rating and defensive passer rating, all won championships.

Criticism

PFF College Football : "Highest passer rating on deepâ€¦" - Twitter. Source : www.trendsmap.com

The NFL on its website states: "Passer rating is used to evaluate passers, not quarterbacks." The formula does not include rushing statistics, sacks, or fumbles, nor does it put added weight on performance during crucial situations such as third downs or fourth quarter scoring drives. Passer rating also cannot account for the quality of wide receivers or pass protection from the offensive line.

To account for the fact that the NFL's passer rating formula does not factor in sacks, Pro-Football-Reference.com introduced Adjusted Net Yards per Passing Attempt (ANY/A). Pro-Football-Reference.com says that the formula [(Passing Yards - Sack Yards + (20 * Passing TD) - (45 * Interceptions)) / (Passes Attempted + Times Sacked)] provides a better estimate of a quarterback's contributions. Still, this number does not include rushing or fumbles.

In 2011, ESPN, Inc. introduced a proprietary statistic called the Total Quarterback Rating (QBR) which it claims more accurately measures a quarterback's contributions to team wins. However, QBR has also been met with criticism amongst analysts and fans.

In general, passer and quarterback ratings reduce multiple aspects of the game on a single number. Notions such as Pareto optimality can be used to evaluate QBs' performance without reducing multiple dimensions to a single number.

Records

Which QBs could Patriots be looking at in the college draft?. Source : www.bostonglobe.com

NFL

Highest passer rating, career (minimum 1,500 attempts): 104.0, Aaron Rodgers, 2005â€"2016
Highest passer rating, season (minimum 100 attempts): 122.5, Aaron Rodgers, 2011

Wide receiver Antwaan Randle El, with a passer rating of 157.5 from 21 completed passes of a possible 26, has the highest career rating of any non-QB with more than twenty attempts. Peyton Manning holds the record for the most games with a perfect passer rating (4). As of 2012, 61 NFL quarterbacks have completed a game with a perfect passer rating of 158.3, and seven have done so multiple times. Phil Simms holds the record for the highest passer rating in a Super Bowl, at 150.92 in Super Bowl XXI.

NCAA

Highest passing efficiency, career (minimum 325 completions): 175.6, Sam Bradford, Oklahoma, 2007â€"2009
Highest passing efficiency, season (minimum 15 attempts per game): 198.9, Baker Mayfield, Oklahoma, 2017

References

2016 college football quarterback stats tell us Mitch Trubisky .... Source : www.footballstudyhall.com

External links

PFF College Football on Twitter: "Baker Mayfield leads the .... Source : twitter.com

NFL.com QB Rating Page
Online passer rating calculator for NFL/CFL, NCAA and AFL formulas
A look at and breakdown of the NFL Passer Rating
NFL Career Passer Rating Leaders
QB Rating Calculator
Adjustable NFL passer rating calculator and database. Stats from 1932 â€" present.
New York Times â€" The N.F.L.'s Passer Rating, Arcane and Misunderstood â€" January 14, 2004

Joe Flacco - Wikipedia. Source : en.wikipedia.org

My Reference

Friday, March 2, 2018

Passer Rating - College Qb