The St. Louis Cardinals will have their hands full if they want to win their two-game series against the Toronto Blue Jays this week as they will be without three key players due to Canada's vaccination policy.

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Indeed, the president of baseball operations for the American club, John Mozeliak, revealed to the media on Sunday that Nolan Arenado, Paul Goldschmidt and Austin Romine will all be missing since they have not been vaccinated against COVID-19.

Johan Oviedo won't be accompanying his teammates either, but in his case it's an expired passport that's the problem.

Remember that Canada requires adequate vaccination against the disease for any foreigner wishing to enter the country.

The two games, scheduled for Tuesday and Wednesday, will be preceded for the Blue Jays by the last meeting of a series against the Red Sox in Boston.

The Ontario team will be looking for a sweep after notably winning the first game 28 to 5.