The Tigers recalled Guenther from Triple-A Toledo on Thursday.

The Tigers optioned Guenther to Triple-A Toledo on Sunday.

The Tigers selected Guenther's contract from Triple-A Toledo on Thursday, Cody Stavenhagen of The Athletic reports.

Guenther (elbow) has made two relief appearances for Double-A Erie since being activated from the 7-day injured list May 29, covering two innings and striking out a batter while allowing one earned run on three hits and one walk.

Guenther (elbow) cleared waivers and was outrighted to Triple-A Toledo on Tuesday.

Guenther (elbow) has resumed throwing off flat ground from 75 feet and is expected to be ready to pitch off a mound by the end of spring training, Evan Petzold of the Detroit Free Press reports.

The Tigers claimed Guenther (elbow) off waivers from the Marlins on Wednesday.

Guenther underwent Tommy John surgery on Thursday, Jordan McPherson of the Miami Herald reports.

Guenther (arm) was placed on the 60-day injured list Sunday, Christina De Nicola of MLB.com reports.

Guenther is dealing with an arm injury which will likely require surgery, Christina De Nicola of MLB.com reports.