The Athletics placed Kurtz on the 10-day injured list Tuesday due to a strained right thumb.
Kurtz visited a hand specialist Monday after sitting out the final two games of the Athletics' weekend series versus the Tigers due to the thumb injury, and he'll be out for at least another week after being diagnosed with an acute on chronic volar plate tear of the MCP joint, per Martin Gallegos of MLB.com. The 23-year-old is receiving a platelet-rich plasma injection Tuesday and is without an official timeline to return.