Baez is undergoing tests for an undisclosed injury and could require a trip to the 10-day injured list, Chris McCosky of The Detroit News reports.
Baez dealt with a hip issue recently, although it's not clear whether that's what's bothering him now. Ryan Kreidler has joined the Tigers in Chicago for their series against the Cubs and will be added to the roster if Baez gets shut down. The veteran has been sharing the shortstop job with Trey Sweeney lately and hasn't made consecutive starts since Aug. 9-10.