Floyd Mayweather finished a 21-year professional career at 50-0, and his last bout came against Conor McGregor. That perfect record has long made him look untouchable, but two early fights still stand out for the rare moments when he was made to work harder than expected.
Jose Luis Castillo challenged Mayweather for the WBC lightweight title in 2002 and pushed enough rounds to raise questions about how comfortable he was under pressure. DeMarcus “Chop Chop” Corley did something even more direct in 2004, catching Mayweather with a big left hand in a fight that showed why some opponents believed southpaws could be a problem.
Those nights matter because Mayweather’s ring career ended with no loss on the ledger and no clear blueprint for beating him. That is what made the little openings so notable. Castillo was aggressive and ambitious enough to win rounds against him, while Corley remembered the fight in blunt terms: “I remember everything,” he said. “We trained hard for Floyd and the game plan was there. We knew he wasn’t a power puncher. But he’s very quick.”
The contrast is what keeps those fights in the conversation. Mayweather was nearly perfect, and most opponents never came close to forcing him out of his rhythm. Castillo and Corley were among the few who did, even if only briefly, and those flashes of discomfort remain the closest thing to a roadmap anyone ever saw.
That is also why the final verdict on Mayweather still feels settled. He walked away after 21 years and 50 wins without a defeat, and the rare moments when he looked vulnerable only deepen the argument that the man who beat the clock in the ring also beat every plan thrown at him.
