When will WBO welterweight champion Manny Pacquiao fight Floyd Mayweather, Jr.? Pacquiao has so far evaded committing to a May 5 fight at the MGM in Last Vegas. Is Pacquiao chicken? Given their records, a Pacquiao-Mayweather bout would be the fight of the century! Pacquiao is 53-6-1 with 39 KOs. Mayweather is 42-0-0 with 26 KOs. Mayweather wants to fight on May 5 before he reports to prison on a domestic violence rap. A judge delayed his sentence so he could fight on that date. Pacquiao's promoters want to wait for the completion of a larger venue to accommodate a larger crowd and earn a bigger purse, or so they say. They could just be waiting to fight Mayweather after he's done his time and isn't in prime condition.