Shane Mosley was scheduled to face Andre Berto for a WBC and WBA Welterweight title unification bout on January 30, 2010. However, the fight (and entire undercard) was called off on January 18, 2010, due to an earthquake in Haiti and Berto losing several family members in the disaster. Negotiations for a proposed matchup between Mosley and Floyd Mayweather Jr. immediately began afterwards, ending with both sides agreeing to a set date of May 1, 2010, at the MGM Grand Garden Arena in Las Vegas, Nevada. The fight was billed "Who R U Picking?"