Data & sound credits

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Regular-season data: nflverse player statistics, player identities, and Pro Football Reference snap counts via nflverse, CC BY 4.0. Filtered and transformed into question eligibility and evidence; rarity is our estimate.

American-football ambience, buildup and cheers: College Football Game.wav by timmyg62, CC0. Edited excerpts, filtering, compression, fades and crossfades.

Safety reaction: Soccer stadium Oehh 2 by Sandermotions and Voice_Crowd_Small_Expression_Boo_Stereo by Nox_Sound, CC0. Layered, filtered and faded. Not used for sacks.

Whistle: referee-whistle.wav by Pablo-F, CC BY 3.0. Excerpted, filtered, normalized and faded. Other effects are original synthesis.

CC0 terms. No creator endorsement is implied. Independent game, not affiliated with the NFL.