Rochester police arrested a man in connection with a stabbing around 6:30 Wednesday night on Earl Street.
Police arrested Anthony Murray, 48, and charged him with second degree assault in connection with the stabbing of Khalil McCray, 17.
Police said there was an argument, and when McCray tried to intervene, he was stabbed in the upper body.
McCray was brought to Strong Memorial Hospital with non-life threatening injuries.
The suspect was taken into custody without incident.