Umanmielen (shoulder) has been ruled out for the remainder of Thursday's preseason contest against the Steelers, Darin Gantt of the Panthers' official site reports.
Umanmielen suffered a shoulder injury in the first half, and it will now officially bring his night to a premature end. He will now shift his focus to being ready for the team's regular-season opener against the Jaguars on Sept. 7.