Dee ihe ga-aga n'ihu na paragraf a - Leonard ga-alaghachikwute Vel's Parnelli Jones ọzọ na 1970, na-arụ ọrụ na onye a ma ama na-arụzi ụgbọala bụ George Bignotti. N'ọsọ mbụ ya n'afọ, Indianapolis 500
ọ ga-akwọ ụgbọala #15 Johnny Lightning PJ Colt-Ford. N'ọsọ ahụ, Leonard tozuru etozu n'ọnọdụ nke iri na asatọ ma n'oge na-adịghị anya ọ na-agba ọsọ n'ọnọdụ nke abụọ na onye otu ya Unser. Injinị Leonard ga-akwụsị ọrụ mgbe agbachara ya gburugburu iri asaa na atọ, ọ ga-abụkwa naanị onye nke iri abụọ na anọ. Achọpụtara ya mgbe agbụrụ ahụ gachara na a tụgharịrị mgba ọkụ injin ahụ, nke pụtara na ọ dịghị ihe dị njọ na injin ahụ nakwa na Leonard gaara aga n'ihu. Leonard ga-asọ mpi na Rex Mays Classic na Wisconsin State Fairgrounds Park Speedway ebe ọ bụ naanị ya na-eduga n'azụ itoolu na-aga n'ụzọ ya na mmeri mbụ ya kemgbe 1965 na Milwaukee. Leonard ga-amalite otu agbụrụ ọzọ n'afọ ahụ, California 500 na Ontario Motor Speedway, ebe ọ ga-eru eru n'ọnọdụ nke isii wee kwụsị n'ọnọdụ nke iri na atọ mgbe ọ tụgharịrị. Leonard ga-akwụsị oge 32nd na isi ihe.