Massachusetts: Mohegan’s challenge to Wynn casino license is revived in Suffolk court Jon Chesto, Boston Globe · October 15, 2019 at 12:55 pm The Encore Boston Harbor casino has been in full swing since June, drawing thousands of employees and gamblers every day to this slice of Vegas on the Mystic. But Wynn Resorts’ old rival for the Boston-area casino license, Connecticut casino operator Mohegan Sun, hasn’t given up the fight, not by a long shot. Mohegan is still asking a judge to invalidate a license that the Massachusetts Gaming Commission awarded to Wynn rather than Mohegan five years ago. Mohegan claims the commission provided unfair advantages back then, that the fix was in for Wynn. It’s not easy to forgive and forget — especially when there’s this much money at stake.