12 rounds

Jackal
Maruyama
VS
Gustavo
Ballas

Ballas · TKO 11/12

May 9, 1981 · Estadio Luna Park, Buenos Aires, 🇦🇷

Maruyama going in0-0-0

Ballas going in47-0-1

Confirmation✓ one source

MethodTKO

Round11 of 12 · 2:11

Sources

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

✓