Has there ever been an Australian NHL player?

Yes, there have been several Australian players in the National Hockey League (NHL). Some notable Australian NHL players include:

1. Nathan Walker: Walker is an Australian professional ice hockey player who currently plays for the St. Louis Blues in the NHL. He is the first Australian-born player to play in the NHL. Walker played for the Adelaide Adrenaline in the Australian Ice Hockey League (AIHL) before being drafted by the Washington Capitals in the third round of the 2014 NHL Entry Draft.

2. Liam Kirk: Kirk is an Australian-British ice hockey player who currently plays for the Arizona Coyotes in the NHL. Born in Sheffield, England, to an Australian father, Kirk grew up playing hockey in Australia and represented the country at various international tournaments. He was drafted by the Coyotes in the seventh round of the 2018 NHL Entry Draft.

3. Marco Rossi: Rossi is an Austrian-Australian ice hockey player who currently plays for the Minnesota Wild in the NHL. Born in Feldkirch, Austria, Rossi holds dual citizenship with Austria and Australia. He played in the Ontario Hockey League (OHL) before being drafted by the Wild in the ninth overall pick of the 2020 NHL Entry Draft.

4. Daniel Sprong: Sprong is a Dutch-Australian ice hockey player who currently plays for the Seattle Kraken in the NHL. Born in Amsterdam, Netherlands, Sprong holds dual citizenship with the Netherlands and Australia. He played in the Quebec Major Junior Hockey League (QMJHL) before being drafted by the Pittsburgh Penguins in the second round of the 2015 NHL Entry Draft.