Bill Brennan (June 23, 1893 <unk> June 15, 1924) aive mutambi wetsiva wekuAmerica akarwa uye akarasikirwa neWorld Heavyweight Champion Jack Dempsey mumutambo wemutambo wakakurumbira uyo wakapera mumutambo wegumi nembiri wegumi nembiri musi waZvita 14, 1920, muMadison Square Garden
. Akarasikirwa naDempsey kekutanga mumutambo usina zita musi waFebruary 5, 1918, muMilwaukee, Wisconsin, mumutambo wechitanhatu unyanzvi.