According to TMZ Sports, mall surveillance footage appears to show a man in a Mayweather TMT shirt punching another man multiple times.
Juan Calderon told TMZ Sports that he works at a kiosk at the mall and temporarily left his booth to ask Mayweather for a photo on behalf of his coworker.
Calderon said he refused to shake hands with one member of Mayweather's group before another member of the group punched him three to five times.
Sources close to Mayweather told TMZ Sports that Calderon instigated the fight.
TMZ Sports reported last week that Mayweather is planning to fight twice next year with one of the bouts being a UFC crossover.