Career
Originally from the University Blues, Ainsworth was used as a back pocket by Geelong over the course of his eight season career. After missing all but one game of the 1971 season as he was traveling in Europe, Ainsworth went on to become club captain in 1973. He lost the captaincy role the following season and retired, aged only 28, at the end of the year in order to concentrate on his legal career.
Ainsworth died on 2 February 2011.