Ramba uchiverenga ndima ino - Pedersoli akadzokera kuItaly muna 1949 kunotamba mutambo wemvura muRoma kuSocietà Sportiva Lazio Nuoto uye akakunda makwikwi eItaly ekushambira mumakwikwi e freestyle nemapoka evamwe vanomhanya. Semunhu aichimboshambira achiri muduku, Spencer ndiye aiva muItaly wokutanga kushambira 100 m freestyle isingasviki miniti imwe apo musi wa19 September 1950 akahwina daro racho mumasekonzi 59.5 muSalsomaggiore. Muna 1949 akaita kutanga kwake munyika yose uye gore rimwe gare gare akadanwa kumakwikwi eEurope
muVienna apo akahwina mumakwikwi maviri ekupedzisira, achipedza ari wechishanu mumamita zana uye wechina mu 4 × 200 m relay.