 Nyorai kupfuurira kweiyi ndima - Unser akavamba kumhanya muna 1949 muModified paRoswell Speedway. Muna 1950, pazera remakore 15, akakunda mukwikwidzi wake wokutanga muSouthwest Modified Stock Cars. Muna 1955, Bobby nevanununa Jerry naAl Unser vakasarudza kutevera makwikwi emakwikwi muUSAC. Muna 1959, munununa wake Jerry Unser akafa mutsaona yokurovedza ye1959 Indianapolis 500. 