Mezue ahịrịokwu na-esonụ: Ọsọ mbụ nke 1975 bụ 1975 Argentine Grand Prix mgbe Andretti lara ezumike nká na nkwụsị nke nnyefe. Tupu mgbe ahụ
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 America ahụ 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.