WBO welterweight boxing champion Manny Pacquaio attended the 63rd annual Miss Universe Pageant last month in Doral, Fla. (Photo: Rodrigo Varela/Getty Images)

Undefeated professional boxing champion Floyd Mayweather, Jr., is returning to the ring in May.

The 37-year-old Grand Rapids native, now of Las Vegas, has agreed to box Manny Pacquaio in a welterweight world championship unification bout on May 2 to be broadcast live on pay-per-view.

The fight is to be at the MGM Grand Hotel & Casino in Las Vegas.

Mayweather, whose nickname is "Money," is a 5-foot, 8-inch 147-pounder who's been fighting of late as a welterweight. His professional record is 47 wins and zero losses with 26 knockouts. He won world titles in several weight classes, and is the current super welterweight and welterweight champion for both the World Boxing Council (WBC) and the World Boxing Association (WBA).

Pacquaio, a 35-year-old from The Phillipines, is 57-5-2 with 38 KOs and is the reigning WBO welterweight world champion.

In a news release issued late Friday by Mayweather Promotions, Top Rank, Inc., Showtime and HBO Sports, Mayweather said:

I am glad my decision to meet with Manny and discuss making this fight happen helped get the deal done. Giving the fans what they want to see is always my main focus.

"This will be the biggest event in the history of the sport. Boxing fans and sports fans around the world will witness greatness on May 2.

"I am the best ever, TBE, and this fight will be another opportunity to showcase my skills and do what I do best, which is win. Manny is going to try to do what 47 before him failed to do, but he won’t be successful. He will be number 48.”

In November, Pacquaio called out Mayweather for a bout after defeating American pro Chris Algieri in Macau.

In December, Mayweather told Showtime he wanted to fight Pacquaio in May.