ProBox TV make their debut in Puerto Rico tonight with a Miguel Cotto-promoted show from San Juan. ProBox TV head to Puerto Rico tonight for the first time, with Miguel Cotto promoting a show from Coliseo Roberto Clemente in San Juan. In the 10-round main event, junior bantamweights Juan Carlos Camacho Jr (13-1, 7 KO) and Fernando Diaz (11-1-1, 3 KO) will square off. The stream goes live at 9 pm ET. Camacho, 25, has won seven in a row following a loss in 2017, while the 22-year-old Diaz is coming off of a good win over previously-unbeaten Lorenzo Smith…