3. PLAYING TRAP WITH WRONG-ARM TECHNIQUE

It is no secret that most even front teams will spill traps to the alley or overhang defenders (usually outside linebackers, a rolled up strong safety or a hard cover 2 corner).  Upon recognition of a downblock from his key, the DL must look immediately to the backside for a pulling guard, and then if no pull is detected he looks to the backfield for a kickout by a FB (or in the case of option teams look for a mesh).  Once he sees trap coming, the DL closes fast and attacks the downfield (towards the LOS) shoulder of the trapper with one of two techniques:

1. The DL can dip his shoulder and rip under the trapper's downfield shoulder, then run his feet around the trapper to get into pursuit. Here's a clip from the NFL via Twitter:

(If the video does not appear above, try this link: https://twitter.com/all22chalktalk/status/625392561813852160)

2. The DL can attack the downfield shoulder of the trapper with both hands and bench press him, creating a bubble in the path of the RB.  This causes the RB to have to bounce even wider and, most importantly, to slow down to get around the disruption in his way.  Once the ball carrier has spilled to the outside, the DL can disengage and pursue from behind.  This is the technique coached by DJ Durkin at the University of Michigan (and formerly at Florida). Here's a still shot of a Michigan LB (walked up as a DE) bench pressing a FB kickout on a power:

The important thing is that the ball carrier must spill to the outside!!!!
Rule number 1 vs trap or kickout blocks, make the ball carrier spill.
Rule number 2, see rule number 1!