Tierney was a prolific full-forward, kicking over 100 goals in a season on three occasions and topping East Perth's goal-kicking five times.
He played as a half forward flanker in the premiership decider against Claremont but was kept goalless.
In 1970 he joined West Torrens in South Australia for a season and was their best forward that year, kicking 65 goals.
At the 1972 Perth Carnival, Tierney represented Western Australia for the first time and kicked 11 goals from his three games.
Tierney was, in 2006, named at full-forward in East Perth's official 'Team of the Century' which took into account the era from 1945 to 2005.