Baseball Data Hub is a free online encyclopedia dedicated to Major League Baseball statistics and history. Its archive spans every season since 1871 and includes profiles for more than 26,000 players, career and season-by-season batting, pitching, and fielding records, over 222,000 game records, franchise histories, and information on ballparks and managers. The site also covers MLB-recognized Negro Leagues statistics and provides season summaries, standings, postseason results, awards, Hall of Fame records, and baseball history features.

Visitors can explore leaderboards for categories such as home runs, batting average, strikeouts, and earned run average, as well as rankings using Player Impact Value (PIV), the site’s proprietary measure of performance relative to a player’s era and playing time. Other tools include player comparisons, head-to-head matchups, an era translator, and lists organized by position, decade, country, and college. Baseball Data Hub draws on sources including the Lahman Baseball Database, Retrosheet, the Chadwick Baseball Bureau, and the MLB Stats API.