Ka kammala wannan magana: A shekara ta 1977, Leonard yana da iko sosai. Ya zama dan wasa na biyu da ya gudu mita 100 a cikin kasa da dakika 10 tare da lokacin lantarki, yana gudu a cikin 9.98 a ranar 11 ga Agusta a Guadalajara (na farko shi ne zakaran gasar Olympics ta 1968 Jim Hines), a yau Leonard ya tsaya a matsayin dan wasan da ke magana da harshen Spanish na 10 na biyu. Leonard kuma yana da kyakkyawan juriya na sauri wanda ya tabbatar da cewa shi ne mafi sauri a duniya a wannan shekara a cikin mita 200 tare da lokaci na 20.08 s. A gasar cin kofin duniya ta farko a shekarar, Leonard ya lashe tagulla a duka mita 100 da 200 yayin da yake wakiltar Amurka. A ranar 13 ga Satumba ya kafa mafi kyawun lokaci na duniya don mita 100 a 10.03 s. Ya kuma lashe lambar zinare a tseren mita 100 a shekarar 1977 a gasar
Wasannin Dalibai na Duniya.