It takes some guile to call the unbeaten fighter considered by some as the top pound-for-pound boxer in the world “scared,” but that’s part of Carlos Cuadras’ charm. Should favored Cuadras defeat his Mexico City neighbor David Carmona on March 18 during a bout on the Gennady Golovkin-Daniel Jacobs undercard at Madison Square Garden, the World Boxing Council on Thursday ruled that Cuadras becomes the mandatory challenger for a possible rematch with Roman “Chocolatito” Gonzalez.