DATA CREDITS
Kalindro computes a proprietary, transformed value index and does not republish source data verbatim. The sources below carry attribution obligations — three are required (two by an open-data license, one by the source’s own notice) and one is requested by its terms. Where a license specifies wording, it is quoted here verbatim.
NFL
PLAYER STATS · ROSTERS · IDENTIFIERS · SNAP COUNTS · PLAY-BY-PLAY
Contains information from nflverse, made available under the Creative Commons Attribution 4.0 International (CC BY 4.0) license. As CC BY requires, this notice gives credit, links the license, and indicates that changes were made: Kalindro derives transformed value-index figures from this data and does not reproduce it verbatim.
AVERAGE DRAFT POSITION (MARKET COMPONENT)
NFL Average Draft Position, used as the market component, is from Fantasy Football Calculator. Their ADP API is free for commercial use and requests a link or mention in return.
MLB
PLAYER IDENTITY CROSSWALK
Contains information from the Chadwick Bureau Register which is made available under the ODC Attribution License (ODC-BY 1.0).
GAME LOGS · BALLPARK IDENTITY · DERIVED PARK FACTORS (2021-2025)
The information used here was obtained free of charge from and is copyrighted by Retrosheet. Interested parties may contact Retrosheet at "www.retrosheet.org".
Used for MLB game logs and ballpark identity, and for the park factors Kalindro computes from those logs. The park factors are derived here and are not Retrosheet figures.
— LEAGUE AND ROSTER DATA IS ACCESSED ONLY WITH EACH USER’S EXPLICIT AUTHORIZATION (SLEEPER AND YAHOO OAUTH) AND IS NEVER REDISTRIBUTED. SOME CROSS-SYSTEM PLAYER-ID MAPPING IS DERIVED INTERNALLY AND NOT REPUBLISHED.