Ober exited Thursday's game against the Tigers with right groin tightness, Do-Hyoung Park of MLB.com reports.
Ober tossed 73 pitches prior to his departure and is considered day-to-day. The right-hander will presumably be monitored in the coming days before the Twins determine his status for his next turn through his rotation. If he's able to play through the issue, Ober tentatively lines up to start on the road Tuesday against Baltimore.