Cornell Duane Green (born August 25, 1976) is an American former professional football player who was an offensive tackle in the National Football League (NFL). He was signed by the Atlanta Falcons as an undrafted free agent in 1999. He played college football for the UCF Knights where he was a four-year starter at offensive tackle. He played high school football at Pinellas Lakewood High.
Green was also a member of the Scottish Claymores, Washington Redskins, New York Jets, Miami Dolphins, Tampa Bay Buccaneers, Denver Broncos, Oakland Raiders, and Buffalo Bills. During his first of two stints with the Buccaneers, he earned a Super Bowl ring in Super Bowl XXXVII.
Green was a teammate of future NFL quarterback Daunte Culpepper at the University of Central Florida. The two would be teammates again in 2007 with the Oakland Raiders.
Green signed with the Buffalo Bills on March 8, 2010.