Urshela (hamstring) began a rehab assignment at Triple-A Toledo on Thursday.
Urshela has been on the injured list since April 20 due to a strained right hamstring, and he has now been given the go-ahead to test his hamstring in a competitive setting. It's unclear how long he will remain in the minors, but it's possible the Tigers wait to activate him until Monday ahead of their upcoming series against the Marlins.