c. 265, § 11
Prize fight; appointment within and fight without state; penalty
Official text prohibited actmental stateif conditionpenaltylegal term
An inhabitant or resident of this commonwealth who, by previous appointment or engagement made in the same, leaves the same and engages in a fight with another person outside the limits thereof shall be punished by imprisonment in the state prison for not more than five years or by a fine of not more than five thousand dollars.
Simplified explanation
A Massachusetts resident who arranges a fight here and then leaves the state to fight faces up to 5 years in state prison or a fine of up to $5,000.