CARSON, Calif. - Cleveland High School graduate Brian Mendoza scored an upset of monstrous proportions Saturday night, knocking out previously unbeaten Sebastian Fundora to capture the WBC interim super welterweight title. Mendoza, a 6-to-1 underdog, was trailing badly through six rounds when he stunned Fundora with a left hook. Mendoza followed with a right-left combination, and Fundora, badly dazed, didn't even atte