Floyd Mayweather Jr. will go down as one of boxing’s giants, provided he can clear one last hurdle.

The 40-year-old Grand Rapids, Michigan, native plans to come out of retirement to face reigning Ultimate Fighting Championship lightweight titleholder Conor McGregor in a blockbuster super fight on Aug. 26 at T-Mobile Arena in Las Vegas. There, Mayweather will attempt to surpass Rocky Marciano in the history books and improve to 50-0 as a professional. “Money” has not competed since he outpointed Andre Berto a little less than two years ago. Victories over Oscar De La Hoya, Manny Pacquiao, Ricky Hatton, Sharmba Mitchell, Arturo Gatti, Diego Corrales, Genaro Hernandez, Marcos Maidana (twice), Miguel Cotto, Saul “Canelo” Alvarez and Shane Mosley highlight Mayweather’s spotless resume.

During a stellar career that spans more than two decades, Mayweather has compiled his share of intriguing statistical data:

1: Olympic medals won. Mayweather, then 19, captured bronze at the 1996 Summer Games in Atlanta, losing a controversial decision to Bulgaria’s Serafim Todorov in the semifinals.

2: Times he has been named The Ring magazine’s “Fighter of the Year.” Mayweather was honored by the publication in 1998 and 2007.

3: National Golden Gloves championships on his resume. He won the prestigious tournament in 1993, 1994 and 1996.

26: Wins by knockout. His list of victims includes Hatton, Mitchell, Gatti, Corrales and Hernandez.

24: Victories over current or former world champions.

7: Consecutive wins by decision.

2,170: Days that will have passed since his most recent knockout -- a fourth-round stoppage of Victor Ortiz in 2011 -- when he climbs into the ring to face McGregor.

23: Months since McGregor last fought. He defeated Berto by unanimous decision on Sept. 12, 2015 at the MGM Grand Garden Arena in Las Vegas.

232: Total punches landed against Berto, according to SHO Stats figures. Mayweather connected on a staggering 67 percent of his power punches in the 12-round affair.

387: Rounds as a professional boxer, or 387 more than McGregor.

5: Weight classes in which he has won a world championship. Mayweather has captured titles at 130, 135, 140, 147 and 154 pounds. He is one of five men in boxing history to pull off the feat, along with De La Hoya, Pacquiao, Thomas Hearns and Sugar Ray Leonard. Only De La Hoya (six) and Pacquiao (eight) have claimed championships in more weight classes.

1,297,940,000: Dollars in pay-per-view revenue Mayweather has generated during his career, according to various reports. Eight of his 16 bouts carried on PPV have surpassed the one-million-buy mark.