Blindside Alpha
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Data Credits

Blindside Alpha is built on a stack of public NFL data and open-source research projects. This page collects the formal attribution required by the licenses of each source. Surface-level UI deliberately avoids vendor branding so the product reads as a single, opinionated tool.

Open-source data sources

  • nflverse — play-by-play, participation, snap counts, schedules, roster history, and contract aggregates. Licensed under CC-BY-SA 4.0. github.com/nflverse/nflverse-data
  • nflfastR — the play-by-play cleaning pipeline that underpins nflverse PBP. Licensed under MIT. nflfastr.com
  • FTN Charting — manual play charting used for advanced situational tags. Re-distributed via nflverse under CC-BY-SA 4.0.
  • NFL Next Gen Stats — public weekly aggregates surfaced via nflverse re-release.
  • Pro-Football-Reference — team standings and historical records, used for hand-curated season summaries. Single-source attribution; no large-scale scrape.
  • OverTheCap + Spotrac — public contract aggregates re-distributed via nflverse under CC-BY-SA 4.0.
  • Sleeper — fantasy league connection API (free public tier).

Methodology

For per-metric definitions, derivations, and validation notes, see the Methodology page. For statistical glossary entries, see Glossary.

CC-BY-SA 4.0 license text: creativecommons.org/licenses/by-sa/4.0. Blindside Alpha derived works follow the share-alike clause where applicable.