What exactly is the Duce Staley Drill? Three bags are laid on the ground to form the shape of the letter T, with the middle bag sandwiched in between the other two. The player lines up behind the left bag and steps over it with the right foot, sidesteps over the middle bag, and goes back over the final one. Then, the player must quickly transition and do it again, starting with the right bag. To finish, the player runs up the field and cuts either to the right or the left based on the look from the coach.

It tests a runner's ability to change direction in a small space. To succeed, a player must display quick feet, show a capacity to toe-tap, and make decisions in an instant.

Not only did Staley get to coach the prospects at the Combine through the drill, sporting his old-school Eagles jacket, but he also had a little bit of help. Sproles, who now serves as a personnel consultant for the Eagles, was on hand to demonstrate it for the players. Sproles retired following the 2019 season ranked fifth in all-purpose yards in NFL history. He earned Pro Bowl honors in each of his first three seasons with the team and helped bring home a Super Bowl Championship in 2017.