Rubuta ci gaba ga wannan sakin layi - A 1954 Keller ya fara sauyawa zuwa Championship Cars. Ya yi tuƙi a cikin jerin AAA da USAC Champ Car, ya yi tsere a cikin shekarun 1954-1959 da 1961 tare da farawa 32, gami da Indianapolis 500 sau shida. Yana da hannu a hadarin da ya kashe Bill Vukovich a 1955
Ka yi haƙuri. Ya gama a cikin manyan goma sau 13, tare da mafi kyawun ƙare na 2 sau biyu (Atlanta a 1956, da Milwaukee a 1961). Mafi kyawun Indy 500 ya gama 5th a 1961.