 John William Grieb November 19, 1879 December 10, 1939 akanga ari mutambi weAmerica uye mutambi wenhandare uyo akakwikwidza mumitambo yeOlympic yeZhizha ya1904. Akaberekerwa muPhiladelphia. Muna 1904 akahwina menduru yegoridhe mumutambo wechikwata wegymnastics uye menduru yesirivha mumutambo wetriathlon. Akanga ariwo wechitanhatu mumutambo wenhabvu, 52nd mumutambo wenhabvu uye 90th mumutambo wenhabvu we triathlon. 