Pedzisa mutsara unotevera: Nelson akasarudzwa neBaltimore Colts mumutambo wegumi nerimwe weNFL Draft ya1957. Pashure pokutamba zvose zviri zviviri quarterback uye anodzivirira shure mukoreji, maColts akamuita mutambi anodzivirira. Nelson akatanga mitambo gumi nembiri mumwaka wake wekutanga, aine 5 akabata 29 yards. Mwaka wakatevera, Nelson aizonyora 8 interceptions ye 199 yards uye 1 touchdown. MaColts aizoenderera mberi kuhwina NFL Championship mumutambo waive wekutanga weNFL wekufa kamwe kamwe uye kubvira ipapo unozivikanwa zvakanyanya se "Mutambo Mukuru Kupfuura Wese Wambotambwa". VaColts vaizodzokorora mu
Muna 1959 uye mumakore ake manomwe ebasa neColts, Nelson aizounganidza 33 interceptions nokuda kwemayadhi 378 uye 3 touchdowns. VaColts vakatengesa Nelson kuNew York Giants nokuda kwemwaka wa1964, wokupedzisira wake muNFL.