<prompt> Qedela umusho olandelayo: U-Unser wenza i-IndyCar yakhe yokuqala ngo-1962 ngaphandle kwemijaho yasePikes Peak eyayiyingxenye yesizini ye-IndyCar ngawo-1950. Wagijimela u-Andy Granatelli phakathi kuka-1963 no-1965 ngenjini yeNovi. U-Unser wagijima emjahweni wakhe wokuqala we-Indianapolis 500 ngo-1963. Wawa ngokushesha futhi wabekwa endaweni yama-33. I-Indianapolis 500 yesibili ka-Unser ngo-  <response>: U-1964 waphela emzuliswaneni wesibili engozini eyabulala u-Eddie Sachs noDave MacDonald. U-Unser wathuthela e-IndyCar eyayiphethwe nguBob Willke kusukela ngo-1966 kuya ku-1970. Ukunqoba kwakhe kokuqala e-IndyCar kwafika ngo-1967 eMosport, e-Ontario. Ngonyaka olandelayo, u-Unser wanqoba i-Indianapolis 500 yakhe yokuqala, wabeka irekhodi njengomshayeli wokuqala ukugijima ngaphezu kwamamayela angu-170 ngehora e-Indianapolis. Ngo-1968, u-Unser wasebenza nomphathi wabasebenzi uJud Phillips futhi wanqoba i-USAC National Driving Championship yakhe yokuqala ngokunqoba eStardust International Raceway, Phoenix Raceway, Trenton Speedway, Indy, nasePikes Peak Hill Climb. 