Police in the Connecticut shoreline town Branford arrested New Haven resident John Mayor on Saturday night. They say he stabbed Nashua, N.H., resident Monte Freire.
Police say Freire was stabbed in the neck with a knife and is hospitalized in critical condition. They say his friends pursued and helped arrest Mayor.
The 45-year-old Mayor is charged with assault and other offenses. He's being held on $500,000 bond.
There's no phone listing for him in New Haven. It was unknown Sunday if he's represented by a lawyer.
Police Capt. Geoffrey Morgan says the attack in a dispute over the decades-long American League East rivalry is a shame.