In the Pacific Coast League, Stothard won six championships with three clubs: three times with Westminster (1956, 1957, 1960–61), once with Vancouver Hale-Co FC (1958), and twice with Victoria O'Keefe (1966–67, 1967–68).
In 1962–63 with Victoria, he played several positions and led his team in scoring with a personal-best 13 goals.
In 1965–66, he won the Austin Delany Memorial Trophy[2] as most valuable player of the Pacific Coast League.
Along with winning two Dominion titles, he won one national runner-up medal with Westminster in 1959.
In June 1968, he was asked to tryout for Canada's national team in preparation for FIFA World Cup Qualifiers, but he declined the invitation on account of his decision to retire from competitive football.