A press conference will be held to announce the fight on Wednesday in The Fourm Club at The Forum, which is now owned by Madison Square Garden and recently underwent a $40 million facelift.

"The fight is done, and it's going to be in a beautiful building, the way that they've refurbished it," said Top Rank CEO Bob Arum. "It has a great history in Los Angeles as the home of boxing for many years, and it's a very important building for Marquez because he got his start there."

A four-division titlewinner who who turns 41 in August, Marquez (55-7-1, 40 knockouts) went 12-0 with nine knockouts at The Great Western Forum. The run started with a first-round stoppage of Martin Ochoa in January 1995 that made Marquez 9-1 with seven knockouts following his American debut.

A loser of his professional debut by disqualification, Marquez was 29-1 with 22 knockouts after his final bout at The Great Western Forum — a second-round knockout of Wilfredo Vargas.

Marquez lost his 31st fight by unanimous decision to Freddy Norwood at The Mandalay Bay Hotel in Las Vegas, representing a failed bid to win the WBA 126-pound belt in September 1999.

"Marquez fought there regularly," said Arum. "That's what has helped to make him the attraction and the fighter that he is."

Marquez was last in the ring for a split-decision loss to Bradley last October, which followed his sixth-round stoppage of Pacquiao in December 2012.

Marquez's ultimate goal is a showdown with Bradley, a split-decision winner over Pacquiao in June 2012, or Pacquiao, against whom Marquez is 1-2-1. A win over either would make Marquez the first Mexican fighter to earn a fifth belt in as many different weight divisions.

A 33-year-old from Denver, Alvarado (34-2, 23 KOs) is 1-2 over the course of his past three fights, all of which happened as a junior welterweight.

Alvarado was stopped in the seventh round by Brandon Rios in Oct. 2012, won their rematch for the WBO's vacant 140-pound belt by unanimous decision last March, and then lost the title by tenth-round knockout to Ruslan Provodnikov last October.

Juan Manuel Marquez at The Great Western Forum

Martin Ochoa   TKO 1  Jan. 30, 1995 

Julio Sanchez Leon UD 10  April 4, 1995

Julio Cesar Portillo KO 6  July 10, 1995
       
Miguel Rodriguez   TKO 1 Sept. 25, 1995
   
Julian Wheeler   TKO 10   Nov. 6, 1995

Hector Ulises Chong  KO 4  March 4, 1996

Freddy Cruz UD 10   July 8, 1996

Rodrigo Valenzuela   RTD 8   Dec. 9, 1996

Agapito Sanchez  UD 12   April 21, 1997

Catalino Becerra   TKO 7  July 14, 1997
               
Luis Samudio  TKO 9  March 16, 1998

Wilfredo Vargas KO 2    May 10, 1999

Total: 12-0, 9 knockouts