Promoter Sampson Lewkowicz, whose Sampson Boxing promotional company has been steadily growing, told ESPN.com that three of his fighters have signed with adviser Al Haymon.

The three are Dominican junior lightweight contender Javier Fortuna (25-0-1, 18 KOs), Dominican junior featherweight prospect Jonathan Guzman (16-0, 16 KOs) and junior featherweight Oscar Escandon (23-1, 16 KOs) of Colombia.

Guzman is the only fighter with a bout scheduled. He will fight in Belfast, Northern Ireland on Sept. 6 when Spain’s Kiko Martinez, whom Lewkowicz promotes, will defend his junior featherweight title in a rematch with Carl Frampton of Belfast.

“I’m very delighted that my boys signed with Al Haymon,” Lewkowicz said. “We have always had a nice relationship. We’ve talked many times. I believe this is the best thing.”

Haymon’s vast stable continues to grow. He has at least 75 fighters under contract and some estimate his stable in excess of 100 fighters -- including, of course, Floyd Mayweather Jr.