The Tigers optioned Brieske to Triple-A Toledo on Saturday.
Brieske made four appearances after joining the Tigers' bullpen July 1, during which he gave up one run on three hits and no walks while striking out four batters in five innings. He now owns a 6.75 ERA through 9.1 major-league innings this year and remains an option to return as bullpen depth for the big club later in the season.