What Flawless Lineup is, and where its data comes from.
Flawless Lineup is an independent, unofficial fan project. It is not affiliated with, endorsed by, or sponsored by the NBA, NFL, MLB, NHL, NCAA, the Premier League, or any team, league, or player. Team names and colors are used only to identify the real franchises. No team logos and no player photos or likenesses are used.
Player records are factual statistics (points, rebounds, assists, etc.) compiled at build time from permissively-available open datasets and bundled into the game. Individual statistical facts are not copyrightable. We do not scrape or redistribute Sports-Reference data.
NBA sources
Pre-1974 steals/blocks are imputed (they weren't tracked then). Other leagues will be added with their own attributed open sources, Lahman for MLB, nflverse for NFL, MoneyPuck for NHL, StatsBomb for soccer. CC BY-SA-derived data, where used, is kept in clearly marked files and shared under the same license.