Toronto placed Taillon on the 15-day injured list with right forearm tendinitis on Tuesday, Keegan Matheson of MLB.com reports.
Taillon completed just four innings Monday against Boston before being removed with discomfort in his right forearm. The 34-year-old will head to the IL for the second time this season and first time as a member of the Blue Jays. The right-hander made just two starts for Toronto since being dealt to the club on Aug. 2 from the Cubs. The Blue Jays recalled Chase Lee from Triple-A Buffalo to take Taillon's spot on the active roster.