Borlase was recruited by Port Adelaide from the Ceduna Football Club.
He debuted for Port Adelaide in 1985 in the South Australian National Football League (SANFL) and played three games in his first season.
He watched from the sidelines as the Magpies procured a hat trick of premierships between 1988 and 1990.
Borlase skippered the Magpies in his final league season in 1998, where the team won another SANFL premiership.
He is an experienced agribusiness executive, having obtained a Graduate Diploma in Agricultural Business and an Associate Diploma of Agricultural Science from the University of Adelaide.