LOS ANGELES  - Accredited media members from around the world came out to the JW Marriott at L.A. Live in Los Angeles Thursday as Floyd "Money" Mayweather (48-0, 26 KOs) and two-time welterweight champion Andre Berto  (30-3, 23 KOs) officially announced their SHOWTIME PPV matchup with taking place Saturday, September 12 from the MGM Grand Garden Arena in Las Vegas.

Also in attendance Thursday were pay-per-view undercard fighters featured on the stacked four-fight telecast. In a rematch of their epic April 11 world-title fight Roman "Rocky" Martinez (29-2-2, 17 KOs) will defend his WBO Junior Lightweight title against four-time world champion Orlando "Siri" Salido (42-13-2, 29 KOs) while WBC Super Middleweight Champion Badou Jack "The Ripper" (19-1-1, 12 KOs) will take on his mandatory challenger "Saint" George Groves (21-2, 16 KOs). A fourth fight on the pay-per-view telecast will be announced soon.

Further undercard action features a super welterweight showdown between Ishe "Sugar Shay" Smith (27-7, 12 KOs) and Vanes "The Nightmare" Martirosyan (35-2-1, 21 KOs), who were also in attendance Thursday to announce their fight.

Promoted by Mayweather Promotions, the four-fight pay-per-view telecast will be produced and distributed live by SHOWTIME PPV and is the sixth and final fight of a record-breaking deal between Mayweather and Showtime Networks Inc. SHOWTIME Sports® will support the event with the Sports Emmy® Award-winning series ALL ACCESS premiering Friday, August 28.