Oscar De La Hoya(01 of12)
Open Image ModalWBC lightweight champion Manny Pacquiao throws a right to Oscar De La Hoya during the third round of their welterweight boxing match in Las Vegas, Saturday, Dec. 6, 2008. (AP Photo/Eric Jamison) (credit:AP)
Lehlohonolo Ledwaba(02 of12)
Open Image ModalManny Pacquiao raises his arm in victory after defeating Lehlohonolo Ledwaba of South Africa, for the IBF Super Bantamweight Championship Saturday, June 23, 2001, in Las Vegas. (AP Photo/Laura Rauch) (credit:AP)
Juan Manuel Marquez(03 of12)
Open Image ModalManny Pacquiao looks at Juan Manuel Marquez after knocking him down in the first round of their WBA and IBF world featherweight title fight Saturday, May 8, 2004 at the MGM Grand Garden Arena in Las Vegas. The fight was scored as a draw. (AP Photo/Joe Cavaretta) (credit:AP)
Erik Morales(04 of12)
Open Image ModalManny Pacquiao lands a left to the face of Erik Morales in their world super featherweight championship on March 19, 2005, at the MGM Grand Garden Arena in Las Vegas. Morales won by decision after twelve rounds. (AP Photo/Eric Jamison) (credit:AP)
Erik Morales II(05 of12)
Open Image ModalManny Pacquiao connects with Erik Morales during the 10th round of their super featherweight boxing match, Saturday night, Jan. 21, 2006, in Las Vegas. Pacquiao won on a 10th-round knockout. (AP Photo/Mark J. Terrill) (credit:AP)
Marco Antonio Barrera(06 of12)
Open Image ModalManny Pacquiao showboats against Marco Antonio Barrera during the 11th round of their super featherweight boxing match at the Mandalay Bay hotel and casino in Las Vegas, Saturday, Oct. 6, 2007. (AP Photo/Jae C. Hong)\r\n (credit:AP)
David Diaz(07 of12)
Open Image ModalManny Pacquiao trades punches with David Diaz during their WBC lightweight championship boxing match at the Mandalay Bay Hotel & Casino Saturday in Las Vegas. Pacquiao won via 9th round TKO. (AP Photo/Eric Jamison) (credit:AP)
Ricky Hatton(08 of12)
Open Image ModalThis May 2, 2009, file photo shows Manny Pacquiao throwing a left to the head of British boxer Ricky Hatton in the second round of their junior welterweight title boxing match in Las Vegas. (AP Photo/ Jae C. Hong) (credit:AP)
Joshua Clottey (09 of12)
Open Image ModalManny Pacquiao and Joshua Clottey during their WBO boxing welterweight title fight in Cowboys Stadium in Arlington, Texas, Saturday, March 13, 2010. (AP Photo/David J. Phillip)\r\n (credit:AP)
Shane Mosley(10 of12)
Open Image ModalManny Pacquiao lands a punch against Shane Mosley in the ninth round during a WBO welterweight title bout, Saturday, May 7, 2011, in Las Vegas. (AP Photo/Mark Terrill)\r\n (credit:AP)
Antonio Margarito(11 of12)
Open Image ModalManny Pacquiao swings at Antonio Margarito during the first round of their WBC light middleweight title boxing match Saturday, Nov. 13, 2010, in Arlington, Texas. (AP Photo/David J. Phillip) (credit:AP)
Miguel Cotto(12 of12)
Open Image ModalManny Pacquiao throws a left against Miguel Cotto, of Puerto Rico, during their WBO welterweight boxing title fight Saturday, Nov. 14, 2009 in Las Vegas. (AP Photo/Jae C. Hong)\r\n (credit:AP)