10 rounds

Sergio
Zambrano
VS
Roger
Mayweather

Mayweather · RTD 6/10

Aug 7, 1986 · Grand Olympic Auditorium, Los Angeles, 🇺🇸

Zambrano going in—

Mayweather going in24-4-0

Confirmation✓ one source

MethodRTD

Round6 of 10 · 3:00

Sources

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

✓