Perez (oblique) will begin a rehab assignment with Triple-A Toledo on Monday, Evan Woodbery of MLive.com reports.
Perez has been sidelined since Aug. 10 with a strained left oblique, but he took live batting practice over the weekend without issue to gain clearance to play in rehab games. The young switch-hitter shouldn't need too many rehab at-bats before returning to the Tigers' active roster.