Mezue ahịrịokwu na-esonụ: Ọsọ mbụ nke 1975 bụ 1975 Argentine Grand Prix mgbe Andretti lara ezumike nká na nkwụsị nke nnyefe. Tupu Brazil Parnelli gbanwere onye na-eweta taya ha na Goodyear mgbe mkpebi Firestone kwụsịrị ịgba ọsọ mana onye America kwụsịrị nke asaa. Andretti gbara onye nke iri na asaa na South African Grand Prix mana ọ kwụsịrị ụgbọ ala ahụ na ntụgharị asatọ iji gaa na nsogbu nnyefe. Na Spain Vittorio Brambilla (March) jikọtara ya na onye America; ụgbọ ala Andretti kụrụ azụ Niki Lauda (Ferrari), na-eziga ya na onye otu Lauda Clay Regazzoni. Lauda apụọla ozugbo, ebe Regazzoni bugara ụgbọala ya n'ebe a na-adọba ụgbọala ma zipụghachi ya. Mgbe mgbagwoju anya nke mbụ ahụ kwụsịrị, e gosipụtara James Hunt (Hesketh) dị ka onye ndu. Andretti jisiri ike na-aga n'ihu, ma na-agba ọsọ na nke abụọ. O bu ụzọ mgbe Hunt dara ma onye America ahụ lara ezumike nká na nkwụsịtụ agbaji. Na Monaco Grand Prix hụrụ Andretti ka ọ lara ezumike nká mgbe ọ banyere pit na ụgbọ ala ya na-enwu ọkụ, nke mmanụ mmanụ kpatara. Ndị otu ahụ hapụrụ Belgium n'ihi na Andretti na ndị otu Parnelli na-agba ọsọ na Indianapolis 500. Onye Amerịka ahụ gbara onye nke anọ na Sweden. Ndị otu ahụ agbagharala Dutch Grand Prix n'ihi na Andretti na ndị otu Parnelli na-agba ọsọ na United States ọzọ. Onye America ahụ bịara nke ise na France. Andretti gbara onye nke iri na abụọ na British Grand Prix. Onye Amerịka a gbara onye nke iri na
Germany. Andretti lara ezumike nká n'ọsọ atọ ikpeazụ, na-agbagharị na Austria, na-ada na Italytali na nkwụsịtụ na United States.