Kammala jumla mai zuwa: Bill Brennan (Yuni 23, 1893 <unk> Yuni 15, 1924) ɗan dambe ne Ba'amurke wanda ya yi yaƙi kuma ya yi rashin nasara ga Gwarzon Duniya mai nauyi Jack Dempsey a cikin yaƙin da aka halarta sosai wanda ya ƙare a bugun zagaye na goma sha biyu a ranar 14 ga Disamba, 1920, a
Gidan wasan Madison Square. Ya yi rashin nasara ga Dempsey a karon farko a wasan da ba a buga ba a ranar 5 ga Fabrairu, 1918, a Milwaukee, Wisconsin, a zagaye na shida na wasan fasaha.