World middleweight title claim · 10 rounds

Young
Peter Jackson
VS
Philadelphia
Jack O'Brien

O'Brien · PTS 10/10

Apr 7, 1905 · 4th Regiment Armory, Baltimore, 🇺🇸

Jackson going in71-20-22

O'Brien going in128-7-19

Confirmation✓✓ two sources

MethodPTS

Round10 of 10

TitleWorld middleweight title claim

Sources

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

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