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AFP PICTURES OF THE YEAR 2011 Floyd Mayweather Jr. Slams A Right To The Head Of WBC Welterweight Champion Victor Ortiz AFP/Getty Images

AFP PICTURES OF THE YEAR 2011 Floyd Mayweather Jr. slams a right to the head of WBC Welterweight Champion Victor Ortiz in the 4th round as referee Joe Cortez looks on, ending the fight on September 17, 2011 at the MGM Grand Garden Arena in Las Vegas. Mayweather beat Ortiz in a knockout to win the WBC Welterweight title. (Photo by John Gurzinski/AFP/Getty Images)

Most outrageous, controversial moments of Floyd Mayweather Jr.'s career

Mayweather's antics have made him the hottest pay-per-view draw in boxing, but he's made plenty of enemies and caused plenty of headaches along the way. Will we see another controversial moment on Saturday when the mercurial star fights Robert Guerrero?

Mayweather's least favorite thing to do | Key wins | 'Money' bloody before fight