Sebastian Horacio “La Promesa” Papeschi and Sampson Lewkowicz Leon Gavilan and Sampson Lewkowicz Sampson Lewkowicz of Sampson Boxing (along with Tello Box), proudly announces a pair of significant co-promotional signings, as super middleweight contender Sebastian Horacio “La Promesa” Papeschi (18-3, 6 KOs) and undefeated super welterweight prospect Leon Gavilan (5-0,

 Friday, January 7 at 10 p.m. ET/PT, live on Showtime, from Caribe Royale Resort in Orlando, Fla. The main event will see heavy-handed Dominican Republic’s Luis Nunez taking on the Puerto Rican, Carlos Arrieta in a ten-round main event. On Nunez’s 22nd birthday in September, Nunez made his United States