Whakaotihia te rerenga e whai ake nei: I timata a Unser i te IndyCar i te tau 1962 (haunga nga whakataetae Pikes Peak i uru ki te waa IndyCar i nga tau 1950). I whakataetae ia mo Andy Granatelli i waenga i te 1963 me te 1965 me te miihini Novi. I eke a Unser i tana whakataetae Indianapolis 500 tuatahi i te tau 1963. I hinga wawe ia, ā, i noho ki te tūranga 33. Ko te rua o nga Indianapolis 500 a Unser i roto i
I mutu te tau 1964 i te huringa tuarua i te tukinga i mate ai a Eddie Sachs raua ko Dave MacDonald. I neke a Unser ki tetahi IndyCar na Bob Willke i 1966 tae noa ki te 1970. Ko tana wikitoria IndyCar tuatahi i tae mai i te tau 1967 i Mosport, i Ontario. I te tau i muri mai, ka wikitoria a Unser i tana Indianapolis 500 tuatahi, ka whakatakoto i te rekoata hei kaihauturu tuatahi ki te whakataetae neke atu i te 170 maero i te haora i Indianapolis. I te tau 1968, i mahi a Unser me te rangatira o te roopu Jud Phillips ka wikitoria i tana toa tuatahi o te USAC National Driving Championship me nga wikitoria i Stardust International Raceway, Phoenix Raceway, Trenton Speedway, Indy, me te Pikes Peak Hill Climb.