SPRINGFIELD, Mass. (WWLP) – MGM Springfield is continuing to make progress on its $million resort casino in the city's South End. You. MGM Springfield President Michael Mathis recently commented that the $ million project, slated to open by September MGM Springfield - bookofraspielen.win MGM Springfield casino update, January (photos, video). The Mass. Gaming Commission granted funds this week to extend a free valet parking program in the South End to ease parking difficulties related to the MGM.