20 rounds

Young
Peter Jackson
VS
Philadelphia
Jack O'Brien

Jackson · KO 13/20

Feb 14, 1900 · Woodward's Pavilion, San Francisco, 🇺🇸

Jackson going in33-3-6

O'Brien going in30-4-14

Confirmation✓✓ two sources

MethodKO

Round13 of 20

Sources

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

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