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Floyd Mayweather Jr. hits Miguel Cotto during their WBA Super Welterweight title bout at the MGM Grand in Las Vegas Saturday, May 5, 2012. (AP Photo/Las Vegas Review-Journal, John Locher) ( APTOPIX Mayweather Cotto Boxing )

Floyd Mayweather Jr. poses for photos after arriving at the MGM Grand casino and hotel, Tuesday, May 1, 2012, in Las Vegas. Mayweather will fight Miguel Cotto for the WBC super welterweight title on Saturday. (AP Photo/Julie Jacobson) ( Mayweather Cotto Boxing )

Boxer Floyd Mayweather Jr. works out at the Mayweather Boxing Club on April 22, 2014 in Las Vegas, Nevada. Mayweather will face Marcos Maidana in a 12-round world championship unification bout in Las Vegas on May 3. (Photo by Ethan Miller/Getty Images) ( 486182573 )

Floyd Mayweather Jr. and his daughter Ayana watch the Los Angeles Clippers play the San Antonio Spurs in their NBA basketball game, Wednesday, Nov. 7, 2012, in Los Angeles. The Clippers won 106-84. (AP Photo/Mark J. Terrill) ( Spurs Clippers Basketball )

Floyd Mayweather Jr. steps into the ring for a 152-pound title fight against Canelo Alvarez, Saturday, Sept. 14, 2013, in Las Vegas. (AP Photo/Eric Jamison) ( Mayweather Alvarez Boxing )

Floyd Mayweather, left, of Grand Rapids, Mich., stands in the ring with his father, Floyd Mayweather Sr., after defeating Diego Corrales of Sacramento, Calif., in their WBC super featherweight championship fight in Las Vegas, in this Jan. 20, 2001 file photo. Floyd Mayweather Jr. and Oscar De La Hoya will soon have their own HBO reality show to promote their megafight in May. Mayweather and his poetry-spewing father could host one themselves, now that they have reconciled with one goal in mind: beating the man Mayweather's father used to train, De La Hoya. (AP Photo/Eric Risberg) ( Tim Dahlberg Mayweather De La Hoya Boxing )

Floyd Mayweather Jr., left, faces off with Canelo Alvarez after the weigh-in for the Saturday boxing bout, Friday, Sept. 13, 2013, in Las Vegas. Mayweather's WBA super world and Alvarez's WBC junior middleweight titles are on the line. (AP Photo/Julie Jacobson) ( Mayweather Alvarez Boxing )

Boxer Floyd Mayweather Jr. plays with his 19-month-old niece Brielle Smith during the final news conference for his bout against Victor Ortiz at the MGM Grand Hotel/Casino September 14, 2011 in Las Vegas, Nevada. Mayweather will challenge Ortiz for the WBC welterweight title on September 17, 2011 in Las Vegas. (Photo by Ethan Miller/Getty Images) ( 124968286EM009_FLOYD_MAYWEA )

Floyd Mayweather Jr. talks with reporters as he is taped up at his gym, Wednesday, Sept. 2, 2009 in Las Vegas. Mayweather will box Juan Manuel Marquez Sept. 19 at the MGM Grand Garden Arena. (AP Photo/Isaac Brekken) ( Mayweather Marquez Boxing )

Floyd Mayweather Jr. is seen in his corner between rounds against Shane Mosley during their WBA welterweight boxing match Saturday, May 1, 2010, in Las Vegas. Mayweather Jr. beat Shane Mosley in a unanimous decision. (AP Photo/Mark J. Terrill) ( Mayweather Mosley Boxing )

Referee Tony Weeks watches Floyd Mayweather Jr., upper left, knock down Juan Manuel Marquez, of Mexico, during their non-title welterweight boxing match in Las Vegas, Saturday, Sept. 19, 2009. Mayweather won by a unanimous decision. (AP Photo/Isaac Brekken) ( Mayweather Marquez Boxing )

Floyd Mayweather Jr., left, and Juan Manuel Marquez, of Mexico, pose during the official weigh-in for their non-title welterweight fight in Las Vegas, Friday, Sept. 18, 2009. The fight will be held on Saturday, Sept. 19. (AP Photo/Isaac Brekken) ( Mayweather Marquez Boxing )

Floyd Mayweather Jr. prepares for his training session in front of the Kodak Theatre on Hollywood Boulevard September 14, 2009 in Hollywood, California. Mayweather Jr. will face Juan Manuel Marquez at the MGM Grand Garden Arena on September 16, 2009 in Las Vegas. (Photo by Jacob de Golish/Getty Images) ( 58350118 )

Floyd Mayweather Jr. center shakes hands with Ricky Hatton, right, of Great Britain, following their WBC welterweight boxing title fight at the MGM Grand hotel-casino in Las Vegas, Saturday, Dec. 8, 2007. (AP Photo/Isaac Brekken) ( Mayweather Hatton Boxing )

Ricky Hatton, of Great Britain, left, is held back from referee Joe Cortez after being called for hitting Floyd Mayweather Jr. in the back of the head during their WBC welterweight boxing title fight at the MGM Grand hotel-casino in Las Vegas, Saturday, Dec. 8, 2007. (AP Photo/Jae C. Hong) ( Mayweather Hatton Boxing )

Floyd Mayweather Jr. kisses his son before his WBC welterweight boxing title fight versus Ricky Hatton, of Great Britain, at the MGM Grand hotel-casino in Las Vegas, Saturday, Dec. 8, 2007. (AP Photo/Isaac Brekken) ( Mayweather Hatton Boxing )

Fans of Ricky Hatton of England cheer him on before his bout against Floyd Mayweather Jr. during their WBC world welterweight championship fight at the MGM Grand Garden Arena on December 8, 2007 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 78112012MW062_World_Welterw )

Ricky Hatton of England is knocked out in the 10th round by Floyd Mayweather Jr. during their WBC world welterweight championship fight at the MGM Grand Garden Arena on December 8, 2007 in Las Vegas, Nevada. (Photo by Al Bello/Getty Images) ( 78112012MW115_World_Welterw )

WBC welterweight champion Floyd Mayweather Jr., left, and Ricky Hatton, of Britain, are pulled apart after Mayweather Jr. pushed Hatton at a news conference held at the MGM Grand hotel and casino in Las Vegas, Wednesday, Dec. 5, 2007. The two will fight in a WBC welterweight title match, Saturday, Dec. 8, in Las Vegas. (AP Photo/Jae C. Hong) ( Mayweather Hatton Boxing )

Floyd Mayweather Jr., foreground, poses with his six title belts after defeating Oscar De La Hoya in split decision to win the WBC super welterweight world championship bout on Saturday, May 5, 2007, at the MGM Grand Garden Arena in Las Vegas. (AP Photo/Kevork Djansezian) ( APTOPIX De La Hoya Mayweather Boxing )

Floyd Mayweather Jr. listens to his uncle Roger Mayweather during his fight against Oscar De La Hoya for the WBC super welterweight world championship boxing match on Saturday, May 5, 2007, at the MGM Grand Garden Arena in Las Vegas. Mayweather Jr. won via 12 rd. split decision. (AP Photo/Kevork Djansezian) ( De La Hoya Mayweather Boxing )

Floyd Mayweather Jr., left, evades a right from Carlos Baldomir of Argentina during their WBC welterweight boxing championship at Mandalay Bay Hotel and Casino on Saturday, Nov. 4, 2006 in Las Vegas. Mayweather defeated Baldomir by unanimous decision. (AP Photo/Laura Rauch) ( MAYWEATHER BALDOMIR BOXING )

Floyd Mayweather Jr. is carried into the ring just before the start of his bout with Carlos Baldomir of Argentina during their WBC Welterweight Championship boxing match, Saturday Nov. 4, 2006, at The Mandalay Bay Resort & Casino in Las Vegas. Mayweather won by unanimous decision. (AP Photo/Eric Jamison) ( MAYWEATHER BALDOMIR BOXING )

Floyd Mayweather Jr., right, gets Shambra Mitchell up against the ropes during the third round of a welterweight bout at the Rose Garden, Saturday, Nov. 19, 2005, in Portland, Ore. Mayweather ended the fight with a straight right hand that landed below Mitchell's rib cage. Referee Richard Steele counted to 10 with Mitchell sitting on the ropes. (AP Photo/Tim LaBarge) ( MAYWEATHER MITCHELL )

Boxing champion Floyd Mayweather Jr., second from right, speaks to the media with his conditioning coach Leonard Ellerbe, right, after being acquitted in a felony battery jury trial in Las Vegas, Friday, July 29, 2005, at the Clark County Courthouse. (AP Photo/Joe Cavaretta) ( MAYWEATHER BATTERY )

20 Apr 2002 : Floyd Mayweather freshens up between rounds during the WBC Lightweight Championship against Jose Luis Castillo at the MGM Grand Garden Arena in Las Vegas, Nevada. Mayweather won by decision after 12 rounds. DIGITAL IMAGE. (Jed Jacobsohn/Getty Images) ( S0420_Mayweather_v_Castillo_JJ003.jpg )

Carlos Gerena, left, of Puerto Rico mixes it up with Floyd Mayweather Jr. of Grand Rapids, Mich., during the WBC super featherweight title fight Saturday, Sept. 11, 1999, in Las Vegas. Mayweather retained his title when referee Richard Steele, on advice of a ringside physician, stopped the fight after the seventh round. (AP Photo/Lori Cain) ( MAYWEATHER GERENA )

12 Apr 1997: Floyd Mayweather stands over top of Bobby Geipert during a fight at the Thomas and Mack Center in Las Vegas, Nevada. Mayweather knocked out Geipert in the first round. (Al Bello/Allsport) ( 9301021P MAYWEATHER V GEIPERT )

Floyd Mayweather enters the ring before his fight against Zab Judah during the Welterweight Championship fight at Thomas & Mack Arena on April 8, 2006 in Las Vegas, Nevada. (Photo by Al Bello/Getty Images) ( 57261213MW020_Floyd_Mayweat )