10 rounds

Mike
Johnson
VS
Roger
Mayweather

Mayweather · UD 10/10

Oct 11, 1990 · Bally's Las Vegas, Paradise, 🇺🇸

Johnson going in—

Mayweather going in37-6-0

Confirmation✓ one source

MethodUD

Round10 of 10

Sources

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

✓