Donald Penn retires as a Raider
Oakland Raiders: Year in Review, grading the Raiders' 2016 offense
Donald Penn retires as a Raider
Thirty-six things we learned from Week 8
NFL 2016 -- The Oakland Raiders' stalwart offensive line makes Derek Carr so safe, he's dangerous - ESPN
Oakland Raiders offensive line: the Silver and Blackest
NFL history: 100 people who shaped the league, pro football - Sports Illustrated
Raiders: Potential starting offensive line combinations - Silver And Black Pride
Oakland Raiders offensive line ranked second in 2016 NFL preview