Orakpo was attempting to make a tackle in the first quarter before hurting himself and staying down for several moments. Eventually, he left the field with the training staff and didn't return to the game at any point.
The injury is worrisome especially because it occurred to the same pectoral muscle that required surgery following last years season finale.
Orakpo is a major part of the Redskins defense coming into his fourth season with the team. In his first three campaigns, Orakpo has 28.5 sacks to lead the team in that time-frame. Any time without him on the field would be a serious hit to the Redskins and their dreams for 2012.