6 rounds

Joe
Choynski
VS
Philadelphia
Jack O'Brien

O'Brien · PTS 6/6

Sep 29, 1901 · America A.C., Chicago, 🇺🇸

Choynski going in55-14-6

O'Brien going in51-5-15

Confirmation✓ one source

MethodPTS

Round6 of 6

Sources

English Wikipedia
side a · observed 2026-10-11
en.wikipedia.org/wiki/Joe_Choynski

✓