Pacquiao and Marquez fought a trio of razor-thin bouts over the previous eight-plus years, with Pacquiao holding a 2-0-1 advantage. In their fourth bout, Pacquiao knocked Marquez down in the fifth round and was on the verge of scoring a knockout until lightning struck in the form of a Marquez right hand. Ring Magazine named this instant classic 2012 Fight of the Year, and Marquez’s one-hitter quitter was the publication’s Knockout of the Year. Try ESPN+ For Free: https://watch.espnplus.com/toprank/ Subscribe to our YouTube channel to get notified about the latest highlights, free full fights, and fight week content as it's posted. Follow Top Rank on Twitter: http://www.twitter.com/trboxing Follow Top Rank on Instagram: http://www.instagram.com/toprank Like Top Rank on Facebook: http://www.facebook.com/trboxing