In 1974, he won his second USAC National Driving Championship and a year later he won his second Indianapolis 500 in a race that was rain-shortened on lap 174.
En 1974 gañou o seu segundo Campionato Nacional de Condución da USAC e un ano máis tarde gañou o seu segundo Indianápolis 500 nunha carreira que se acurtou na volta 174 pola chuvia.