It joined two other license winners: Penn National, which was awarded the slot parlor license, and Wynn Massachusetts, which was awarded the Eastern Massachusetts Region A casino license. MGM officially received the license on June 13, 2014. (Had either Hard Rock or Mohegan Sun won voter approval, the state's gaming commission would have had to make the final decision.) MGM Springfield won the bid for the Western Massachusetts license on November 6, 2013, when Palmer voters blocked the Mohegan Sun proposal, leaving MGM Springfield as the only Western Massachusetts proposal to win voter approval. On September 11, 2013, West Springfield voters voted to block the Hard Rock proposal, leaving only MGM and Mohegan Sun in the race for the license. MGM was then in a three-way race with Hard Rock's West Springfield proposal and Mohegan Sun's Palmer proposal. On April 30, 2013, Mayor Dominic Sarno selected MGM Springfield as the winning proposal for the City of Springfield, defeating the Penn National proposal for the north end of the city, and on July 16 Springfield voters approved the casino application, making MGM Springfield the state's first proposal to win voter approval in its host community. On December 2, 2012, MGM Springfield and Penn National Gaming's Springfield proposal became the remaining two proposals for Springfield when Ameristar withdrew its Springfield proposal for the former Westinghouse site. Casinos were also proposed for Holyoke, Palmer, and West Springfield. MGM Springfield was one of three proposals in the city of Springfield, Massachusetts for the Western Massachusetts casino license. Chris Kelley is the current President and COO of the MGM Springfield.

It reopened to the public on July 13, 2020, after nearly 4 months of being closed, with safety precautions and reduced capacity in place. It was temporarily closed on March 14, 2020, due to the COVID-19 pandemic. It is owned by Vici Properties and operated by MGM Resorts International.

Opening on Augin a block of buildings that are historically or culturally influential to Springfield, it became the first resort casino in the Commonwealth. MGM Springfield is a hotel and casino complex situated in the heart of Metro Center, Springfield, Massachusetts, United States.

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