Floyd Mayweather Jr. debuted as an Olympic boxer at the 1996 Summer Games in Atlanta.
He since has grown into one of the greatest boxers in the sport's history and has a 49-0 record going into his Aug. 26 bout against Conor Mcgregor.
Watch Mayweather go from Olympian to "Pretty Boy" Floyd to Floyd "Money" Mayweather in these photos.
Floyd Mayweather Jr. in 1996
U.S. Olympian Floyd Mayweather Jr. of Grand Rapids, Michigan, holds an American flag in his mouth as he awaits the judges decision during a pre-Olympic tune-up in Miami on June 17, 1996 against Viacheslav Smirnov of Russia.
Floyd Mayweather Jr. in 1997
Floyd Mayweather Jr. trades blows with Angelo Nunez during a fight on Nov. 20, 1997, at the Grand Olympic Auditorium in Los Angeles, California.
Floyd Mayweather Jr. in 1998
WBC super-featherweight champion Floyd Mayweather Jr. in his corner with his trainers for the bout against Angel Manfredy at the Miccosuree Indian Reservation in Miami on Dec. 19, 1998. Floyd Mayweather had little trouble in defending his with a second-round TKO.
Floyd Mayweather Jr. in 1999
Floyd Mayweather Jr. of Grand Rapids, Mich., poses for photos after defeating Carlos Gerena of Puerto Rico in a WBC super featherweight title fight on Sept. 11, 1999, in Las Vegas. Mayweather retained his title when the fight was stopped after the seventh round.
Floyd Mayweather Jr. in 2000
WBC super featherweight champion Floyd Mayweather Jr. of Grand Rapids, Mich., celebrates his victory over Goyo Vargas of Mexico during their fight at the MGM Grand Garden in Las Vegas on Saturday, March 18, 2000. Mayweather retained his title by unanimous decision.
Floyd Mayweather Jr. in 2001
Floyd Mayweather Jr., left, stands in the ring with his father, Floyd Mayweather Sr., after defeating Diego Corrales in their WBC super featherweight championship fight in Las Vegas on Jan. 20, 2001.
Floyd Mayweather Jr. in 2002
Floyd Mayweather Jr. weighs in at 134 pounds on April 19, 2002, in Las Vegas for his fight against Jose Luis Castillo of Mexico for the WBC lightweight championship.
Floyd Mayweather Jr. in 2004
Floyd Mayweather Jr., left, recovers after throwing a punch at DeMarcus Corley during the third round of the super lightweight eliminator fight at Boardwalk Hall in Atlantic City, N.J., on May, 22, 2004.
Floyd Mayweather Jr. in 2005
Sharmba Mitchell, left, and WBC super-lightweight champion Floyd Mayweather Jr., pose for a photo following a news conference on Oct. 19, 2005, in Portland, Oregon.
Floyd Mayweather Jr. in 2006
Floyd Mayweather Jr. speaks during a news conference at Caesars Palace in Las Vegas on April 6, 2006, to promote his fight against Zab Judah in a welterweight championship boxing match.
Floyd Mayweather Jr. in 2007
Floyd Mayweather Jr. speaks during a news conference after beating Ricky Hatton in a WBC welterweight boxing title fight at the MGM Grand in Las Vegas, on Dec. 8, 2007. Mayweather beat Hatton by knockout in the 10th round.
Floyd Mayweather Jr. in 2008
Floyd Mayweather Jr. tosses a roll of dollars to fans at a news conference at the Staples Center in Los Angeles on Feb 25, 2008. Mayweather was preparing to wrestle as part of WWE's "WrestleMania XXIV" the next month in Orlando, Florida.
Floyd Mayweather Jr. in 2009
Floyd Mayweather Jr. talks with reporters as he is taped up at his gym on Sept. 2, 2009 in Las Vegas as he prepares to fight Juan Manuel Marquez.
Floyd Mayweather Jr. in 2010
Floyd Mayweather Jr. arrives at the MGM Grand on April 27, 2010, in Las Vegas for fight week against Shane Mosley.
Floyd Mayweather Jr. in 2011
Floyd Mayweather works out on the heavy bag at his gym on Sept. 6, 2011, in Las Vegas in preparation for his Sept. 17 fight against Victor Ortiz for the WBC world welterweight championship.
Floyd Mayweather Jr. in 2012
Floyd Mayweather Jr., leaves the Clark County Detention Center in Las Vegas on Aug. 3, 2012, after serving two months of a three-month sentence in a misdemeanor domestic battery case.
Floyd Mayweather Jr. in 2013
Floyd Mayweather Jr. eats licorice as he attends Game 1 of the WNBA Western Conference semifinal series between the Phoenix Mercury and the Los Angeles Sparks on Thursday, Sept. 19, 2013, in Los Angeles.
Floyd Mayweather Jr. in 2014
Floyd Mayweather Jr. poses on the scale during a weigh-in on Friday, Sept. 12, 2014, in Las Vegas before his fight against Marcos Maidana.
Floyd Mayweather Jr. in 2015
Floyd Mayweather Jr. attends a news conference Wednesday, April 29, 2015, in Las Vegas. Mayweather will face Manny Pacquiao in a welterweight boxing match in Las Vegas on May 2.
Floyd Mayweather Jr. in 2016
Boxer Floyd Mayweather Jr. sits courtside as the United States takes on Argentina during the men's quarterfinal match on Day 12 of the Rio 2016 Olympic Games at Carioca Arena 1 on Aug. 17, 2016 in Rio de Janeiro, Brazil.
Floyd Mayweather Jr. in 2017
Boxer Floyd Mayweather attends a game between the Brooklyn Nets and the Phoenix Suns at Barclays Center on Thursday, Mar. 23, 2017 in Brooklyn, New York.