The Yellow Jackets will go into this weekend’s matchup with Boston College minus several potential difference makers on defense and a key player on the offensive line. Linebackers Brad Jefferson (arm/wrist) and Anthony Barnes (shoulder) will not play on Saturday against the Eagles. Shane Bowen, a linebacker who suffered a quadriceps injury last week against Jacksonville State, is probable for Saturday’s game. Offensive lineman A.J. Smith is out due to an unspecified illness.