BoxRec

IMO

Marvin Johnson UD 8
Tony Sibson KO 1
Mustafa Wasajja TKO 3

If those were his best, I would not like to se the worst.
Wassaja was way gone when they fought.
Sibson was just a young fighter giving away a lot of weight. (Sibson got a lot better later on.)
Marvin Johnson lost a 8 round fight he thought was a 10 round fight.