The Federal Electoral Institute says welterweight Juan Manuel Marquez will have to pay 29,000 pesos (C$2,258.26) for having the Institutional Revolutionary Party's logo emblazoned on his trunks during the fight in Las Vegas.
Marquez lost to Filipino Manny Pacquiao in the Nov. 12 bout, which was watched live by millions in Mexico.
The governing National Action Party complained that the logo violated a temporary ban on campaigning ahead of elections in Michoacan state.