Duff is a still developing edge rusher but has the frame, length and upside for the next level as he continues to develop and pack on weight through his senior year. He is a long and rangy edge player that can get off the ball quickly, shoots his hands when working half a man and can squeeze and take on pullers with ease while very high IQ in the run game and is stout against the run. He plays with a consistent motor when collapsing the pocket, shows some good bend underneath bigger tackles while able to win with both speed and power around the corner. Duff has really been flying a bit under the radar so far but should have a breakout senior season and be drawing plenty of college attention then.