Venditte was recalled from Triple-A Buffalo on Wednesday, Barry Davis of Sportsnet reports.
Venditte has appeared in two innings for the Bisons and has struck out five batters, which warranted a callup when the Blue Jays were in need of a left-hander to replace Aaron Loup and Franklin Morales. The switch-pitcher will likely slot into a middle-relief role while also taking a fair amount of matchups with left-handed batters. In a corresponding move, Arnold Leon was designated for assignment.