The Blue Jays recalled Tiedemann from Triple-A Buffalo on Saturday.
Tiedemann was optioned to Triple-A on Friday, but he's back with the big club after Jameson Taillon (elbow) was placed on the 15-day injured list. Tiedemann made his major-league debut Aug. 15 against the Yankees and made a second appearance with the Blue Jays on Tuesday against the Guardians, when he walked two batters in one scoreless inning.