Mopping up against the Orioles, Jose Valverde gave up four runs and five hits in the ninth Wednesday.
Tigers optioned OF Avisail Garcia to Triple-A Toledo.
Nate McLouth went 3-for-5 with two doubles, a steal and two runs scored against the Tigers on Wednesday.
David Ross will visit concussion specialist Dr. Mickey Collins on Thursday in Pittsburgh.
Prince Fielder went 0-for-4 on Wednesday and is without a homer since June 4.
Chris Perez (shoulder) will not be activated from the disabled list this Friday.
Astros first-round pick Mark Appel is expected to make several minor league starts this season.
Brett Lawrie (ankle) took grounders and some light batting practice on Wednesday afternoon.