Nyorai kupfuurira kweiyi ndima - Walker akapiwa chigaro chenguva yakazara cheFormula One kuti atyaire Lotus 72 mumwaka wa1972, semutyairi wechipiri kuna Emerson Fittipaldi. Zvisinei, sezvo mwaka waipfuurira, vose vari vaviri Walker nechikwata vakatanga kuora mwoyo zvikuru. Pashure pokunge Lotus yawana kuti Walker akanga aedza motokari yeFormula Two yeimwe timu, akabviswa muchikwata nokuda kweItaly GP
uye muCanada GP, uko akatsiviwa naReine Wisell. Walker akanga adzoka nokuda kweUS GP, asi akarega basa.