Question:  The David Diaz vs. Manny Pacquiao bout took place at a resort and casino operated by what company?
Context: Manny Pacquiao vs. Shane Mosley, billed as The Undaunted, was a welterweight fight for the WBO Welterweight championship.  The bout was held on May 7, 2011, at MGM Grand, in Las Vegas.  Pacquiao defeated Mosley by unanimous decision and retained his WBO Welterweight Championship.  The fight was Manny Pacquiao's first PPV fight in Showtime boxing due to HBO not choosing to air the fight. Manny Pacquiao vs. Brandon Ríos (billed as Fight as One or Clash in Cotai) is a boxing welterweight championship fight for the vacant WBO International Welterweight championship.  The bout was held on 24 November 2013 at the Venetian Macau resort & hotel in Macau.  Pacquiao won via unanimous decision and took the vacant WBO International Welterweight title.  Pacquiao said that the fight would be dedicated to the victims of the recent typhoon hit in the Philippines.  The fight drew 475,000 ppv buys. Mandalay Bay is a 43-story luxury resort and casino on the Las Vegas Strip in Paradise, Nevada.  It is owned and operated by MGM Resorts International.  One of the property's towers operates as the Delano; the Four Seasons Hotel is independently operated within the Mandalay Bay tower, occupying 5 floors (35–39). David Diaz vs. Manny Pacquiao, billed as Lethal Combination, was a lightweight title boxing match.  The bout took place on June 28, 2008 at the Mandalay Bay, Las Vegas, Nevada, United States.  Pacquiao defeated Diaz via technical knockout in the ninth round.  The fight sealed Pacquiao's status as the best pound-for-pound fighter after he was elevated to the #1 spot because of the retirement of the undefeated five-division champion Floyd Mayweather Jr. weeks prior to the fight and put Pacquiao's name in the history books as the only Asian fighter to win five world titles in five weight classes. Floyd Mayweather Jr. vs. Manny Pacquiao, billed as "The Fight of the Century", or the "Battle for Greatness", was a professional boxing match between undefeated five-division world champion Floyd Mayweather Jr. and eight-division world champion Manny Pacquiao.  It took place on May 2, 2015, at the MGM Grand Garden Arena in Las Vegas, Nevada.  Mayweather Jr. won the contest by unanimous decision, with two judges scoring it 116–112 and the other 118–110.  Although the fight was considered to be one of the most anticipated sporting events in history, it was largely considered a letdown by critics and audiences alike upon its broadcast. Oscar De La Hoya vs. Manny Pacquiao, also billed as The Dream Match, was a professional boxing welterweight superfight.  The bout took place on December 6, 2008 at the MGM Grand Garden Arena, Las Vegas, Nevada, United States.  Pacquiao defeated De La Hoya via technical knockout when De La Hoya decided not to continue with the fight before the start of the ninth round.  The card was a co-production of Bob Arum's Top Rank Boxing and De La Hoya's Golden Boy Promotions and was aired live on pay-per-view (PPV) on HBO PPV.  The fight is notable for propelling Manny Pacquiao to full-blown superstar status in much of the western world (mostly in The United States), as Oscar De La Hoya symbolically "passed the torch", so to speak, to Pacquiao. Manny Pacquiao vs. Ricky Hatton, billed as The Battle of East and West, was a boxing match for "The Ring" light welterweight championship.  The bout was held between Manny Pacquiao of General Santos, Philippines and Ricky Hatton from Manchester, United Kingdom. Kenny Bayless (born 1950) is an American boxing referee from Nevada.  He is best known for having refereed many of the sport's superfights, including Manny Pacquiao vs. Ricky Hatton, Oscar De La Hoya vs. Floyd Mayweather Jr., Ricky Hatton vs. Paulie Malignaggi, Miguel Cotto vs. Antonio Margarito, Manny Pacquiao vs. Miguel Cotto, as well as Floyd Mayweather Jr. vs. Manny Pacquiao.  Bayless's catchphrase, when giving his instructions to the fighters before the opening bell, is "What I say you must obey." Manny Pacquiao vs. Juan Manuel Márquez IV, billed as Fight of the Decade, was a professional boxing match.  It was also billed unofficially as deciding the World Boxing Organization's "Champion of the Decade".  This was the fourth and final meeting between Manny Pacquiao and Juan Manuel Marquez.  The bout was held on December 8, 2012, at the MGM Grand in Las Vegas, Nevada and drew 1.15 million pay-per-view buys. Manny Pacquiao vs. Juan Manuel Márquez III, billed as The 25th Round Begins, was a boxing championship bout for the WBO welterweight title.  The bout took place on November 12, 2011, at the MGM Grand in Las Vegas, Nevada and was distributed by HBO PPV.  The fight also marked a return to HBO for Pacquiao and drew 1.4 million pay-per-view buys.
Answer: MGM Resorts International.