Police in the Connecticut shoreline town Branford arrested New Haven resident John Mayor on Saturday night. They say he stabbed Monte Freire, a resident of Nashua, N.H.
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.