Marquez vs Pacquiao

Was reading this article by Bill Simmons and I came upon this section where he writes that Marquez probably used performance enhancing drugs which made him win and knock out Pacquiao.

"My favorite recent look-the-other-way example: Juan Manuel Marquez couldn't knock down Manny Pacquiao for 36 solid rounds over three of their fights. Before their third fight, the 39-year-old Marquez aligned himself with a disgraced strength-and-conditioning coach named Angel Heredia (Google his name and PEDs; it's a fun 10 minutes), arrived in Vegas so ripped that he weighed in four pounds under the 147-pound limit, knocked Pacquiao down early with a vicious power punch, then coldcocked him a few rounds later with one of the single greatest knockout punches ever thrown. What did we do? We bought the fight, gathered in our living rooms. We oohed and aahed, tweeted our disbelief and forwarded the YouTube clip around. And when Marquez passed the bogus post-fight drug test — for the record, Keith Richards in 1978 after a night at Studio 54 could pass one of boxing's drug tests — everyone let the moment go.

Know this: Every boxing fan I know believes that Marquez enhanced his chances that night."