Dirk was born in Regina, Saskatchewan. He was selected 54th overall in the 1984 NHL Entry Draft by the St. Louis Blues. He would turn pro in 1986 and spend the next five seasons bouncing between the NHL club and the Peoria Rivermen, the Blues IHL affiliate. He would finally stick on the Blues roster full-time in 1990–91, appearing in 41 games before being moved to the Vancouver Canucks in a 6-player deal at the trade deadline.