Debuted on 4 May 1869 with ten salaried players and finished the season unbeaten (57-0). Location: Cincinnati, Ohio. Key figure: 57-0 season. Part of the One State One Record (USA) campaign. Reference record compiled from public sources; not certified by The Book of World Records. Source: https://baseballhall.org/discover/pro-baseball-began-in-cincinnati-in-1869
Record no. MRB-2026-007205
First Openly All-Professional Baseball Team
Reference Record – Not Certified
This record is compiled from publicly available sources for reference. It has not been examined or certified by The Book of World Records.