10 rounds

Billy
Stephan
VS
Oscar
Bonavena

Bonavena · TKO 6/10

Dec 18, 1964 · Madison Square Garden, New York City

Stephan going in—

Bonavena going in7-0-0

Confirmation✓ one source

MethodTKO

Round6 of 10

Sources

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

✓