BetMGM pulled off a coup of sorts [last] week in landing an official partnership with the Boston Red Sox three days before the launch of mobile sports betting in Massachusetts.

Under the deal, BetMGM will receive signage on the iconic Green Monster in left field at Fenway Park, the team’s home since 1912. It is located within walking distance of DraftKings’ headquarters in the city’s Back Bay neighborhood.

The partnership was signed against the backdrop of a strict regulatory climate, as Massachusetts unveils one of the most stringent advertising standards in the nation. One unique regulation in the Bay State may restrict sportsbooks to advertising only when at least 75% of observers will be the legal gambling age of 21 or older.