Trevor Siemian made his NFL debut Sunday in the second quarter of the Denver Broncos' Week 15 game against the Pittsburgh Steelers.
Denver starting quarterback Brock Osweiler — who himself was starting in place of the injured Peyton Manning — was injured late in the second quarter and was taken to the locker room.
Siemian took one snap, a kneel down on the final play of the half.
Osweiler is probable to return. The Broncos lead the Steelers 27-13 at halftime.