Dempsey is certainly not KO'ing Tua. Tua deserves that credit from the list of big punchers he faced while meanwhile Dempsey was coldcocked by Flynn and dropped by utter neophyte Firpo and brittle-fisted lightheavy Tunney. Dempsey faced nothing comparable in the combination of power, skill (yes, Tua was very skilled in the style his physical attributes demanded) and accomplishment. Meanwhile Tua faced and defeated 4 former or future champs and dispatched them all. Tua KO7.