The South Carolina linebacker group lost one member to the transfer portal Tuesday in Bangally Kamara. However, a valuable presence both on and off the field remains. Sixth-year transfer Demetrius Knight Jr. has made plays and mentored others in his first year with the Gamecocks. Knight was a three-time ACC Academic Honor Roll selection while at Georgia Tech. He spent four years in Atlanta and his most recent season with the Charlotte 49ers. For a Gamecock defense with a handful of underclassmen contributors, Knight has been there to steady the ship. “I was preaching during the halftime of the…