The initial group was missing star closer Eric Gagne and starting pitcher Rich Harden, who are coming off injuries. Larry Walker, who retired after last season, confirmed he would not play for Canada but planned to be with the team in some coaching capacity.
Pitcher Ryan Dempster told team officials he will not participate because he does not want to put too much strain on his arm nearly three years after ligament replacement surgery on his elbow.
The 16-nation tournament is scheduled for March 3-20. Baseball Canada has until 24 hours before the event begins to complete its roster.