The list includes mostly players from NHL teams that failed to qualify for the playoffs. 13 of the players already have World Championship experience and all rookies have international experience on national junior teams.
More players will be watched for the remaining spots in the roster including potential candidates in the playoffs that could be added after the first round.
Hockey Canada also added two Canadians playing in Europe as alternate players with goalkeeper Fred Brathwaite (Adler Mannheim, Germany) and defenceman Joel Kwiatkowski (Severstal Cherepovets, Russia).
The 20-man roster as of April 13:
Goalkeepers: Josh Harding (Minnesota), Dwayne Roloson (Edmonton).
Defencemen: Drew Doughty (Los Angeles), Dan Hamhuis (Nashville), Chris Phillips (Ottawa), Luke Schenn (Toronto), Shea Weber (Nashville), Ian White (Toronto).
Forwards: Colby Armstrong (Atlanta), Shane Doan (Phoenix), Mike Fisher (Ottawa), Dany Heatley (Ottawa), Shawn Horcoff (Edmonton), Matthew Lombardi (Phoenix), James Neal (Dallas), Derek Roy (Buffalo), Martin St. Louis (Tampa Bay), Jason Spezza (Ottawa), Steven Stamkos (Tampa Bay), Scottie Upshall (Phoenix).