The Blue Jays recalled Robertson from Triple-A Buffalo on Saturday.
The Blue Jays claimed Robertson off waivers from the Angels on Thursday.
The Angels designated Robertson for assignment Sunday.
The Angels claimed Robertson off waivers Tuesday from St. Louis.
The Cardinals designated Robertson for assignment Sunday.
The Cardinals activated Robertson (elbow) from the 15-day injured list and optioned him to Triple-A Memphis on Monday.
Robertson (elbow) allowed two runs on two hits and two walks over one inning in his first rehab appearance with Triple-A Memphis on Tuesday.
Robertson (elbow) is scheduled to throw live batting practice Friday at Double-A Springfield, John Denton of MLB.com reports.
Robertson (elbow) is scheduled to throw a bullpen session Saturday, Lynn Worthy of the St. Louis Post-Dispatch reports.
The Cardinals placed Robertson on the 15-day injured list Sunday, retroactive to May 23, due to right elbow inflammation, Jeff Jones of the Belleville News-Democrat reports.