6 rounds

Jimmy
Watts
VS
Philadelphia
Jack O'Brien

O'Brien · KO 4/6

Dec 18, 1902 · Broadway A.C., Philadelphia, 🇺🇸

Watts going in—

O'Brien going in86-5-15

Confirmation✓ one source

MethodKO

Round4 of 6

Sources

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

✓