The son of a Czech immigrant, Marustik began his career at his hometown side Swansea City, making his way through the club's youth system.
He made his professional debut for the club in August 1978 at the age of 17 in a 2–2 draw with Tottenham Hotspur in the second round of the League Cup.
[3] He was forced to wait seven months before he made his league debut against Peterborough United.
His time at Ninian Park was hampered by injuries and, after two years at the club,[4] he left to play non-league football for Barry Town and Newport County before moving to Australia.
[6] In December 2008, Marustik was arrested for drunk driving after testing nearly four times over the legal limit.