Los Angeles: Floyd Mayweather's blockbuster May 2 bout with Manny Pacquiao will help make the American fighter's 2015 earnings shatter the all-time record for a sportsman's annual pay, Forbes.com calculated on Thursday.

Forbes noted that Mayweather will likely to earn at least $150 million and Pacquiao more than $100 million for the welterweight world title showdown in Las Vegas. The financial news website said payouts could be higher still if more than three million pay-per-views are sold. Mayweather's haul would represent the highest yearly earnings ever by an athlete, surpassing Tiger Woods' inflation-adjusted record of $125 million in 2008, Forbes said.