A youth baseball playoff game in Massachusetts came to an abrupt halt Monday night when a crazy brawl broke out between players and fans ... and police tell TMZ Sports they're now investigating the melee!
The chaotic scene played out in the fourth inning of the American Legion playoff game between Milford Post 59 and East Springfield at Fino Field in Milford, Mass. ... an incident which appeared to kick off after E.S. players and fans along the third base line began jawing back-and-forth.
The Milford Legion Baseball live stream captured the insane incident on video .