6 rounds

John
Almaguer
VS
Jeff
Mayweather

Mayweather · MD 6/6

Aug 1, 1989 · Showboat Hotel and Casino, Las Vegas, 🇺🇸

Almaguer going in—

Mayweather going in7-0-1

Confirmation✓ one source

MethodMD

Round6 of 6

Sources

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

✓