Manny Pacquiao, widely considered the world's best pound-for-pound fighter, is defending his WBO welterweight championship against "Sugar" Shane Mosley on Saturday at the MGM Grand Garden Arena in Las Vegas. The fight marks Pacquiao's second defense of the 147-pound title he won from Miguel Cotto in 2009. The first came against Josh Clottey in March 2010, after which Pacquiao moved up and beat Antonio Margarito for a vacant super welterweight title last November. That victory made Pacquiao the first boxer to capture world championships in eight different weight classes (from 112 to 154).

In May 2004, Márquez fought Lineal & The Ring Featherweight Champion Manny Pacquiao in a bout where Márquez was knocked down three times in the 1st round. Marquez outboxed Pacquiao for the remainder of the bout which was ended in a controversial, split-decision draw. The final scores were 115–110 for Márquez, 115–110 for Pacquiao and 113–113. Judge Burt A. Clements (who scored the bout 113–113) later admitted to making an error on the scorecards, because he had scored the first round as 10–7 in favor of Pacquiao instead of the standard 10–6 for a three-knockdown round

The first fight between Manny Pacquiao and Marco Antonio Barrera has been the fight of the year of 2003 (while for Ring Magazine was Arturo Gatti vs Micky Ward 3). For Manny Pacquiao was the second fight in the featherweight division, he had won the first one against Serikzhan Yeshmagambetov (2003-03-15), while Barrera was fighting in this category since 2001 when he defeated Naseem Hamed. Manny Pacquiao vs Marco Antonio Barrera 1 was not valid for any world title but it was certainly one of the greatest boxing fights ever

The rematch between Manny Pacquiao and Juan Manuel Marquez took place at Mandalay Bay, Las Vegas on March 15, 2008. These two men laced up for an unbelievable show down.

Broner vs. Maidana for the WBO world welterweight title Saturday night at the Alamodome in San Antonio, Texas, USA. Marcos Maidana won via unanimous decision after dropping Broner twice.

May 8, 2004. A mildly-mustachioed, 25-year-old Pinoy wrecking ball named Manny Pacquiao, fresh off a knockout of legendary Mexican warrior Marco Antonio Barrera, is making his third trip to the featherweight division. He has defended his super bantamweight titles eight times and, after taking home The Ring featherweight title at the expense of Barrera, is looking to expand his trophy case by adding the WBA and IBF featherweight titles. Rather reluctant to part with them is 30-year-old Juan Manuel Márquez. Aside from a highly-controversial split-decision loss in 1999 and a disqualification in his debut, he is unbeaten in more than 40 fights. Of his last 11 opponents, 10 have been stopped before the final bell, the sole survivor losing a technical decision. Considering that Pacquiao has stopped 12 of his last 13, all but two inside six rounds, that this fight will be absolutely crazy is pretty much a given.