Mezue ahịrịokwu na-esonụ: PC1 bidoro na 1974 Canadian Grand Prix na Donohue ruru eru 24th ma mechie 12th. Donohue lara ezumike nká n'ọsọ ụlọ ya na Penske n'ọsọ na-esote
1974 United States Grand Prix nke emere na Watkins Glen mgbe ọ gụsịrị akwụkwọ nke iri na anọ, na-enweghị ike ịkwụsị agbụrụ ahụ n'ihi nkwụsịtụ azụ azụ.