Semien will have surgery on his right wrist after a CT scan revealed a fracture of the scaphoid bone, Jane Lee of MLB.com reports.

Although the shortstop was initially diagnosed with a bone contusion, further tests revealed troubling news for Semien and the A's. There is currently no timetable for his recovery, though he won't even be reevaluated for another six weeks after the procedure, so it could be a while until he's back with the A's. Adam Rosales has been filling in at shortstop during his absence and could see the majority of the reps in Semien's place, though Chad Pinder has been recalled and could get a look as well.