QUINCY, Mass. (March 26, 2024)  – Granite Chin Promotions (GCP) has announced the launching of its innovative one-night tournament, “Granite Chin Box Off,” on Saturday night, May 11, featuring a quartet of throw-back super middleweight fighters from New England headlining the “Rumble at the Rink” pro boxing card, at Quincy Youth Arena in Quincy, Massachusetts.