The following season he was a regular in the seniors and played 17 games of a possible 20 games. A rover, he was let go by Collingwood during the 1968 VFL season and finished the year at Street Kilda. His father, Tom Wallis, had played at Collingwood in the 1940s.
Wallis was captain of the Collingwood Under-19s team which won a premiership in 1965. Wallis transferred to South Australian National Football League (SANFL) club West Adelaide in 1969, winning the club"s Best & Fairest award in his first season with them and won the award for a second time in 1973.
Wallis, who kicked 27 goals that year, was a member of the Collingwood side which lost the 1966 VFL Grand Final.
