<prompt> Pedzisa mutsara unotevera: Kevin Patrick Callan muzvinabhizimisi wokuAmerica wokushambira. Muna 2017, akahwina menduru yesirivheri mumakwikwi e4x200-metre freestyle relay ku  <response>: 2017 World Junior Championships. Mumitambo yeOlympics ya2020, Callan aive chikamu che4x200-mita freestyle relay iyo yakawana nzvimbo yechina. 