Tigers optioned RHP Keider Montero to Triple-A Toledo.
Montero, who tossed three scoreless innings against the Panama on Wednesday, has proven an invaluable stopgap option for Detroit’s rotation, piling up 189 innings over the last two seasons and recording a respectable 4.57 ERA — 5.06 xERA — during that span. His demotion always seemed inevitable after the Tigers brought in Framber Valdez and reunited with Justin Verlander in the offseason, and while the timing seems weird, he’s just one of a number of players getting demoted in advance of leaving to join WBC teams.