Career
Petäjä, who played as a defender, played professionally in Finland, Sweden and Switzerland for TPS, Östers IF, Helsingborgs IF, Malmö FF, Yverdon-Sport, Husqvarna FF and Inter Turku.
Petäjä, who played as a defender, played professionally in Finland, Sweden and Switzerland for TPS, Östers IF, Helsingborgs IF, Malmö FF, Yverdon-Sport, Husqvarna FF and Inter Turku.