Ya kasance 2-0 tare da 3.18 ERA ga Cards lokacin da suka ba shi tsakiyar kakar zuwa San Francisco Giants don Frank Linzy. Tare da Kattai, Johnson ya fito a matsayin daya daga cikin manyan masu taimako a cikin National League, ya gama na shida a Cy Young Award balloting a lokacin da irin wannan girmamawa ya kasance da wuya ga masu taimako. A cikin, Johnson ya tafi 12-9 tare da 2.97 ERA da ceto goma sha takwas don Giants masu cin nasara. A cikin kakar wasa ta karshe, ya jefa 1.1 innings kuma ya ba da gudu biyu ga Pittsburgh Pirates a wasan hudu na
Gasar Gasar Gasar Kasa ta 1971.