Definitely Danny Garcia after Matthysse. That was the best he's ever looked, he actually showed more technical skill than I'd ever seen from him. Now he looks so predictable and ordinary...
Hagler beating hearns,, was never the same vs Mugabi and leonard..
Roy jones beating tarver
Margarito beating cotto
None of these dudes were ever the same
Any examples you can think of where the fighter won their big fight but went on the decline afterwards?
Margarito after Cotto.
Vernon Forrest after Mosley (I and II).