After coming out of retirement with his former boss, Penske, Donohue returned to Formula One, entering into the final two races of the 1974 Formula One season.
Logo de saír da súa retirada co seu ex-xefe, Penske, Donohue regresou á Fórmula Un, participando nas dúas carreiras finais da tempada 1974 da Fórmula Un.