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Even though the Jets technically play a 3-4 defense, it is actually a mix of 3-4, 4-3, and 46 concepts to comprise the most multiple defense in football.
Meanwhile, Coples has great scheme versatility. Although he will be listed as a 5-technique in a 3-4, the Jets will use him in just about every position on the defensive front seven. In particular, the Jets will want him to apply interior pressure.
When the Jets get into 4-3 looks or sub packages, Coples can move from his 5-technique position to a 3-technique, which is an ideal alignment for penetration through the "B" gap.
Coples actually played defensive tackle during his junior season, and he actually had more sacks from the interior than when he was moved to defensive end the following season.
A lot has been made about the Jets' need for an edge rusher, but the truth is that interior pressure is much more effective because the quarterback has nowhere to step up into the pocket. With nowhere to step up, Maybin will close quickly on stranded quarterbacks.