6 rounds

Jack
Williams
VS
Philadelphia
Jack O'Brien

O'Brien · KO 3/6

Dec 5, 1903 · National A.C., Philadelphia, 🇺🇸

Williams going in—

O'Brien going in105-6-16

Confirmation✓ one source

MethodKO

Round3 of 6

Sources

English Wikipedia
side b · observed 2026-10-11
en.wikipedia.org/wiki/Philadelphia_Jack_O'Brien

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