Rubuta ci gaba ga wannan sakin layi - Peterson ya fara aikinsa na tseren motoci a tseren kart, al'ada ta al'ada inda yawancin direbobi masu tsere ke fara ayyukansu a cikin tseren motar. Bayan ya lashe lambobin karting da yawa, gami da lakabi biyu na Sweden a cikin 1963 da 1964, ya koma Formula Three, inda ya lashe gasar Monaco Grand Prix Formula Three don gasar Grand Prix ta 1969
Ka yi haƙuri. Daga baya a waccan shekarar ya lashe Gasar Turai ta FIA Formula 3 kuma ya koma Formula One, yana tsere wa ƙungiyar masana'antar Maris. A cikin shekaru uku da ya yi tare da tawagar, ya dauki podiums shida, mafi yawansu an zira kwallaye a lokacin 1971 Formula One kakar wanda ya kuma gama a matsayin mai tsere a gasar zakarun Turai.