Advanced Stats Glossary

A running list of features, stats, and FAQ about the numbers on this site.

Leaderboards

• EPA: Expected Points Added

  EPA translates yards to points in context. A 3 yard gain on 1st and 10 is bad; a 3 yard gain on 3rd and 2 is good. How can we compare? EPA takes into account the down, distance, yardline, and game state of each play to calculate the added point value of every play. It is an explosiveness-weighted measure of success: how often did you provide positive value, and on average, how much positive value did you add? It is analogous, roughly, to wOBA in baseball. A higher EPA on offense is good, and a lower EPA on defense is good.

  • EPA/Pass: EPA per play when a quarterback attempts a pass, excluding scrambles and sacks.
  • EPA/Rush: EPA per designed rush, excluding scrambles and sacks.
  • EPA/Play: Accounts for every offensive snap.
  • EPA60: Total EPA based on a set unit of 60 offensive plays.
• MARGIN: EPA MARGIN

  A weighted average of offensive and defensive EPA that provides a quick measure of overall team efficiency, with a slight emphasis on offense.

• SRte: Success Rate

  A binary measure of efficiency: a success is any play where EPA >= 0, and a failure is any play with EPA < 0.

  • Pass SRte: Success rate when a team attempted a pass, including all dropbacks, scrambles, and sacks.
  • Rush SRte: Success rate when a team rushed the ball.
• Record: Wins and losses on the season.
• xRecord: Expected wins and losses based on the stats from each game. A large difference between expected and actual record suggests that a team was better than their record.
• Garbage Time: Any drive where a team is up or down by an egregious amount, or where results are not informative due to backups playing.

Team Pages

Explanation of various stats seen on team pages:

• Win Pct: Actual win percentage.
• xWin Pct: Expected win percentage based on stat profile.
• Diff: The difference in actual and expected win percentage.
• PPG Margin: Actual points per game margin.
• xPTS Margin: Expected points per game margin (based on drive quality).
• EPA/G Margin: Total EPA per game margin (based on play efficiency).
• First Rte: Frequency of earning a first down on first or second down.
• ED EPA: Early downs (1st and 2nd) EPA, indicating consistent ball movement early in drives.
• ED Rush Rte: How often a team runs on first and second down, reflecting style rather than context.
• Avg 3rd: Average third down distance faced.
• 3rd Conv: Third down conversion rate.
• AYDS: Percentage of available yards gained on a drive.
• Avg FP: Average starting field position of drives.
• Eckel: A "quality possession" if a team scores a big play touchdown or gets a first down inside the opponent's 40-yard line.
• Eckel Rte: Frequency of creating a quality possession.
• Pts/Eckel: Points per quality possession.