Right-hander Leonel Campos (Venezuela), lefty Shane Dawson (Canada), lefty Jake Fishman (Israel) and righty Jordan Romano (Italy) were the Blue Jays Minor Leaguers who made the list.
Even though Osuna, Estrada, Happ, Fishman and Campos were named to their rosters, it doesn't guarantee they will actually pitch. That's because they were named to a designated pitcher pool, which is being implemented by the World Baseball Classic for the first time, and is designed to increase each country's depth on the mound.
Each team has the option of using the designated pitcher pool (DPP), which works like this: A team can use up to 10 designated pitchers but can't have more than two on its active roster at a time.