Replays

Step through a finished game one situation at a time and watch every projection move with it. The simulation sees the real down, distance, clock and score at each point, never a bucketed approximation, and knows nothing about what happens next.

Free with an account, for every game.

The simulation engine is not reachable: simulation service 502:

A replay is not a backtest. It runs the shipped engine against the situations a real game reached, using only what was known before that game, the same numbers a reader would have had at the time. How the engine scores across a whole season, stat by stat, is on the accuracy pages.