Kammala wannan jumla: Gethin ya fara fitowa a F1 don McLaren a
1970 Dutch Grand Prix, ya maye gurbin wanda ya kafa kungiyar, Bruce McLaren, wanda aka kashe a Goodwood Circuit a farkon watan. Ya shiga ƙungiyar mota uku wanda kuma ya haɗa da Andrea de Adamich da Dan Gurney. Ya cancanta sosai a Zandvoort, yana ɗaukar 11th, 2.110s a bayan Jochen Rindt's pole lokaci don Lotus. Ya kasance tara na goma na biyu a gabansa mafi shahararren amma tsufa abokin aikinsa Gurney. Ya shiga cikin kyakkyawar yaƙi a farkon tseren tare da Matra na Henri Pescarolo, amma ba da daɗewa ba ya sami mafi kyawun Faransanci kuma har yanzu yana gudana a cikin 10th lokacin da ya sami hatsari a zagaye na 19.