Originally from Metropolitan Football League (MFL) club Reservoir, the half forward flanker played 19 games and kicked 6 goals for Collingwood between 1970 and 1972.
Tredrea was initially going to head to Queensland but instead moved to South Australia where he played for Port Adelaide in the SANFL, making his SANFL debut in 1973.
Tredrea played 65 games with Port Adelaide and six games with West Adelaide before his premature retirement in 1979 due to a knee injury.
Following his retirement, Tredrea has remained involved with the SANFL and AFL arms of Port Adelaide, coaching junior and reserves grades before his appointment as assistant coach to Tim Ginever for the 2008 SANFL season.
He is the brother of Australian cricketers Sharon and Janette Tredrea[1][2] and the father of Port Adelaide player Warren Tredrea.