About Pro-Football-Reference.com

Sources

Football Stats Glossary
All of the stats of Pro-Football-Reference.com

Pro Football Positions
Explanation of each position abbreviation on our site

Win Probability Explained
Step-by-step explanation of Win Probability

Approximate Value
Explanation of the creation and meaning of Approximate Value

Comebacks and Game-Winning Drives
Learn the meaning of a fourth quarter comeback or game-winning drive

Leaderboard Minimums
Statistical minimums required to be on a season or career leaderboard for a rate stat

Statistical Coverage
Find out what years we have certain stats for