By Rick Reeno

According to Stephen Espinoza, Executive Vice President and General Manager of Showtime Sports, Floyd Mayweather Jr. (48-0, 26KOs) has given absolutely no indication that he intends to fight beyond his scheduled return on September 12th at the MGM Grand in Las Vegas.

In the aftermath of his record shattering pay-per-view against Manny Pacquiao on May 2nd, Mayweather told reporters that he plans to retire after his upcoming September fight. Very few believed him then, and very few believe him now. Mayweather has walked away from boxing on at least two occasions and came back within a reasonable timeframe. At 38-years-old, he'll have to come back sooner than later if he plans to have a 50th fight.

Mayweather's next fight will be his final obligation in the exclusive multi-fight agreement with CBS/Showtime.

Espinoza rejects the industry rumors that a three fight extension is being negotiated. From every conversation the two sides have had, Mayweather is sticking to his guns - for the moment - that September 12th will be his final pro fight.

"There is not a shred of truth in all of these reports about an extension being  negotiated. Neither Showtime or CBS have had any discussions regarding extending Floyd's deal and there are no plans to do so. Floyd has told us very consistently that this will be his last fight and we take him at his word. Floyd has said that consistently since May 3rd," Espinoza told BoxingScene.com.

If Mayweather follows through with his promise to walk away, but then decides to return for a 50th fight at some point in the future - as a free agent - it would open up the door for a bidding war between the Showtime, HBO and the various networks that are presently aligned with Mayweather's adviser Al Haymon.

If that scenario happens, Espinoza feels very confident that Showtime and Mayweather will continue working together.

"We have a great relationship with Floyd. Our deal has been very successful for him and very successful for us. We've done five fights and generated nearly 10 million pay-per-view buys. We're very confident that Floyd's happy and if he decides to come back in the future -we believe that we'll be the first call," Espinoza said.