Young Jack O'Brien, Date of Birth, Place of Birth
TweetYoung Jack O'Brien
American boxer
Date of Birth: 11-Oct-1894
Place of Birth: Philadelphia, Pennsylvania, United States
Profession: boxer
Nationality: United States
Zodiac Sign: Libra 
About Young Jack O'Brien
- Young Jack O'Brien, born John Thomas Augustine Hagan , was a lightweight and welterweight boxer from Pennsylvania.
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