The stats used on this site, explained without the jargon tax. EPA, Win Probability, CPOE — if you've seen these numbers in the tools and wondered what they actually measure, start here.
Expected Points Added measures how much a play moved the needle — not in yards, but in points. Why a 5-yard gain on 3rd-and-4 is worth more than 10 yards on 1st-and-10.
The number that says "your team has a 73% chance to win right now" and where it comes from. How score, time, field position, and down combine into a single probability.
A field guide to the Drive Tracker interface. What each metric means, how to compare drives, and what the EPA and win probability charts are telling you.
Completion Percentage Over Expected adjusts for throw difficulty. Why raw completion % is a terrible QB metric and what CPOE tells you instead.
Every metric used on this site, defined in one place. Passing, rushing, receiving, and efficiency stats — with data sources and the honest limitations of each.