Saunders, a British Columbia native, has previously represented Canada in the 2008 Olympics and 2013 World Baseball Classic, where he was named to the All-World Baseball Classic team.
The 30-year-old Saunders is a .235 career hitter in eight Major League seasons with the Mariners and Blue Jays.
Cash Kruth is a reporter for MLB.com. Follow him on Twitter at @cashkruth. This story was not subject to the approval of Major League Baseball or its clubs.