Zach “Shark Attack” Calmus (center), pictured with Private Jewels Fitness trainer Alex Sepulveda (right) and manager Patty Tanguay-Herlihy (left), won his professional boxing debut fight over the weekend, earning a knockout victory over Yhago Goncalves Saturday in Derry, N.H. (Courtesy Photo)

Marblehead’s Zach Calmus wins professional boxing debut

This past Saturday was a surreal day for Marblehead native Zach Calmus, who realized a dream when he won his first professional boxing match at Granite Chin Promotions’ "Gold Rush” at New England Sports Center in Derry, N.H. Calmus, a heavyweight who trains at Private Jewels Fitness in Lynn, won via technical knockout just 2:48 into the very first round against his opponent Yhago Goncalves. Calmus hurt Goncalves with a short punch and the referee called the fight when he determined Goncalves was unable to continue.

“It might’ve been my first pro fight and it might’ve felt a little different with the smaller gloves and no headgear, but to be honest I felt right at home out there,” said Calmus, who goes by the nickname “Shark Attack” in the ring. “I felt stronger than I ever have and I felt really comfortable, so I just went out there and threw every punch as hard as I could.”

“He was determined from the very beginning, and when he took this fight he told me that he wasn’t going to lose,” said Calmus’ trainer Alex Sepulveda, who owns and operates Private Jewels Fitness. “He’s a…

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