Governor Charlie Baker introduced a new proposal on Thursday that aims to legalize Massachusetts sports betting, and tax those bets on professional sports both online and at casinos. The law would allow other entities to be licensed to offer the modality as well. Baker detailed that he would file legislation to allow the Massachusetts Gaming Commission (MGC) to license the three casino operators in the state to offer on-site and online sports betting. This legislation would also pave the way for other operators, such as daily fantasy sports (DFS) entities to be licensed for sports betting. “Our legislation puts forth…