Building the ideal NFL defense for the next five years - Sports Illustrated
What college coaches look for in a defensive line prospect - State of The U
Drake Jackson Prototype 3-4 Defensive End
Defensive Prototypes: 6- and 7-Techniques, PFF News & Analysis
The NFL's prototypical defensive linemen for each DL technique, NFL News, Rankings and Statistics
The NFL's prototypical defensive linemen for each DL technique, NFL News, Rankings and Statistics
Pro Football Journal: The Top 3-4 Defensive Ends In NFL History