Rubuta ci gaba don wannan sakin layi - Marshall ya taka leda a tawagar kasa tsakanin 1982 da 1987, ya yi gasa a wasannin Olympics na 1984 a Los Angeles. Marshall kuma ya wakilci Ostiraliya a Gasar Cin Kofin Duniya guda biyu; 1983 da aka gudanar a Brazil da 1986
da aka gudanar a Tarayyar Soviet.