In his debut season for West Adelaide, Fielke won the Sam Suckling Memorial Medal as the club's best first year player.
The arrival of Neil Kerley as coach in 1981 saw The Bloods go from being one of the worst to one of the best teams in the SANFL, although at times their famous inconsistency showed through.
Fielke battled back and regained his place in the side shortly before the finals, for which West had easily qualified as the minor premier, winning 18 of their 22 regular season games.
[3] During the 1985 season Fielke led the league in disposals (kicks and handballs), and used the ball very effectively against tough opposition in helping West Adelaide to the preliminary final and a 3rd-place finish.
At the time of his retirement, Fielke's career total of 351 premiership matches was ranked equal fifth (with Ralph Sewer) in South Australian elite football behind Peter Carey (423), Russell Ebert (373), Crows coach Graham Cornes (356), and Crows teammate and captain Chris McDermott (354): as of 2022, he is ranked equal seventh (with Sewer) behind them, as well as Tyson Edwards and Andrew McLeod (both 363).
Since his football career, Fielke has been involved in numerous West End Slowdown games from the year 2000 to present, which is run by The Little Heroes Foundation.
Depending on the viewpoint taken, his South Australian total of 397 or 400 senior career matches ranks either fourth behind Peter Carey (467), Russell Ebert (421) and Chris McDermott (415 or 429), or equal fourth with Andrew McLeod (if McLeod's International Rules matches are included) in elite South Australian football.
In September 2019, Fielke was violently attacked and severely injured when two men invaded his home in the early hours of the morning.