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Sources, credits & information

The people and services behind the research. This page is the home for source credits and site policies.

Data sources & attribution

ESPN

Schedules, rosters, depth charts, reported injuries, game statistics, linked news headlines and player headshots. News links lead to the original publisher. Photos and other ESPN materials remain the property of their respective rights holders.

nflverse contributors

Play-by-play records, player identifiers and historical schedule context. Sideline aggregates play-by-play into player game statistics and derives research flags.

Data license: CC BY 4.0 · Schedule source

The Norwegian Meteorological Institute (MET Norway)

Weather forecasts from MET Norway through Locationforecast. Sideline converts units, selects an estimated game window and derives weather-severity indicators.

CC BY 4.0 · licensing and attribution

greerreNFL / Stadiums

Venue locations and time-zone context. Sideline derives straight-line travel estimates; these are not recorded team itineraries.

ParlayAPI

Aggregated sportsbook and pick’em lines and market context provided by ParlayAPI. This is an aggregation service; it is not a direct feed from the named operators. Each line retains its original source attribution. Coverage, prices and availability can vary. Terms of Service · Acceptable Use Policy

The Odds API

On-demand exact-selection lookup for supported PrizePicks transfers. Availability is checked before showing a verified transfer link.

Sleeper

Supplementary NFL player metadata and historical participation context when available.

Public exchange player props

Kalshi public markets API and Polymarket Gamma API supply supported NFL player contracts. Prices are exchange asks converted to American odds; fees are not included. Contracts retain their own settlement rules. Season futures, unsupported periods and ambiguous player/game matches are excluded.

Platforms & visuals

Sportsbook, pick’em and exchange names identify the original sources. Names, logos and marks belong to their respective owners. Inclusion in the source catalog does not imply complete coverage or an endorsement.

Typography: DM Sans and Barlow Condensed, distributed through Google Fonts under their included font licenses.

Hosting and aggregate site analytics: Cloudflare. Source code and refresh workflows: GitHub.

Research notes

Historical hit rates describe the recorded sample; they are not forecasts. Missing data stays unavailable, and ties are not hits. Research filters and manual exclusions can change the displayed sample.

Share cards show the selected prop, source, line and sample at the time they were created. Lines and availability can change afterward. Any hypothetical analysis line is labeled.

News timing does not establish what caused a line move. Weather indicators and historical median lines are exploratory context.

Use & source information

Sideline Research provides information for personal research, not financial, legal or gambling advice. Past performance does not guarantee future results. Recorded quotes can be delayed, incomplete or different from an operator’s current price; confirm the line, fees and settlement rules with the original source.

Research is intended for adults 18 and older. Operator links are intended for users 21 and older where legally permitted. You are responsible for meeting the operator’s age, location and eligibility rules.

All source names, logos and trademarks remain the property of their owners. Source identification does not imply affiliation, sponsorship or endorsement. We retain data-source credits and do not present aggregated quotes as direct operator feeds.