Great trainers make great fighters... Countless times talent has been mistrained, and has gone to waste. Mayweather Sr. tought Oscar how to improve his defense, and how to use his right hand. Despite his decline in speed I believe that Oscar is a better fighter than he used to be, and the only reason he lost IMO two fights with FMSR is because he was at middleweight which was too large for him against two very good fighters in Felix Sturm, and of course Bernard Hopkins. He taught Mayweather JR. how to be among the best defensive fighters ever, and more importantly his fighters come prepared, and they are focused. You never see one of his fighters come in like TOney does or Zab Judah which is perhaps the most important thing of all.