It's a credit to everything Manny Pacquiao has achieved, since his time with Freddie Roach, that the best Floyd Mayweather Jr. can muster by way of explanation is that Pacquiao must be cheating.
How else could anyone have moved up all those weight-divisions and spanked so many champions so handily?
How has Pacquiao retained all that speed despite packing on pound-after-pound of added muscle?
Besides anything steroids would give a fighter, Pacquiao's has also grown enormously as boxer. His arsenal is vastly improved. His footwork is so finely tuned it's given his punches the look of enormous power that might be sneakier than you think. With speed, accuracy and an undefended target, you're going to find considerable results when hitting someone on the chin no matter how strong you are. Manny's developed into a fighter capable of showcasing better punches instead of necessarily hitting harder.
And maybe he is hitting harder, too.
But let's look at how the Manny Pacquiao of today stands a better chance than anyone at using his fists to hand Mayweather not only his first loss, but his first KO loss...