Philadelphia Jack O'Brien 91-8-14-4 (KO 54)

Bouts 117 Rounds 748
KO Ratio 28% Opposition Ratio 02.735
Birth Name Joseph Francis Anthony Hagen
Birthdate 17 Jan 1878
Death Date 12 Nov 1942 / age 65
Height 5′ 10½″ / 179cm
Residence Philadelphia, Pennsylvania, USA
Birth place Philadelphia, Pennsylvania, USA
Boxer Division middleweight
Manager Trainer