World middleweight title claim · 15 rounds

Young
Peter Jackson
VS
Philadelphia
Jack O'Brien

O'Brien · DQ 2/15

Mar 24, 1905 · 4th Regiment Armory, Baltimore, 🇺🇸

Jackson going in71-19-22

O'Brien going in127-7-19

Confirmation✓✓ two sources

MethodDQ

Round2 of 15

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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