Floyd Mayweather drops Golden Boy

— -- Hours after Richard Schaefer's Monday resignation as chief executive of Golden Boy Promotions following months of infighting with company co-founder/majority shareholder/president Oscar De La Hoya, pound-for-pound king Floyd Mayweather Jr. dumped the company.

Mayweather, whose fights generate the biggest pay-per-view numbers in the sport, has worked with Golden Boy on a fight-by-fight basis for all of his nine bouts since his 2007 blockbuster against De La Hoya, which set the all-time pay-per-view buy record at nearly 2.5 million subscriptions.

But Mayweather, whose own company, Mayweather Promotions, co-promoted his fights, only worked with Golden Boy because of Schaefer, with whom he has grown close over the years. Mayweather and De La Hoya do not like each other and have never hidden that fact.

So when Mayweather, the junior middleweight and welterweight champion, returns for his next fight on Sept. 13, Golden Boy will no longer be involved, Mayweather Promotions chief executive Leonard Ellerbe told ESPN.com Monday night.

When asked if Mayweather would work with Golden Boy again without Schaefer, Ellerbe said, "Absolutely not."

That is a big hit worth millions of dollars to De La Hoya's company.

"We have a great working relationship with Richard Schaefer and that will never change," Ellerbe said. "Richard is a good friend and a great businessman and an excellent promoter. Richard will have an impact in anything that he decides to do, a tremendous impact. He built that company from the ground up and did a phenomenal job. We've had a very close relationship for a number of years and worked hand-in-hand on a number of great fights.

"Mayweather Promotions will continue to promote Floyd's fights and Floyd will continue to put on the biggest fights in boxing. I have a tremendous team and staff and we continue to expand year by year and we're ready to go."

Golden Boy Promotions had no comment. 

Schaefer, the former Swiss banker who co-founded Golden Boy Promotions with close friend De La Hoya in 2002, has served as its only CEO. His