Onwuasor (hamstring) was placed on injured reserve Saturday.
Onwuasor spent the first 10 weeks on IR with a knee injury. He returned in Week 11 and played just eight snaps on special teams, and now he'll go back to the reserve list. The 28-year-old linebacker will be required to miss at least three games. Harvey Langi is in line to start at inside linebacker moving forward.