How NFL clubs evaluate def. linemen

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When NFL scouts go to colleges around the nation this Fall, they are looking for three qualities when it comes to defensive lineman.

1. ABILITY TO PLAY FRONT-SIDE BLOCKS. Meaning, at the point of attack, plays run right at them. This is the first thing scouts look at. Often the players are double-teamed -- can they split the block and make a play, separate and make a tackle.

2. HOW THEY DEFEND AGAINST BACK-SIDE BLOCKS. When the ball goes away from them, do they demostrate athletic ability to chase it down. Players will have to ward off a potential cut block and work their way down the line of scrimmage, move laterally, and make a tackle.

3. PASS-RUSH ABILITY. Probably the most important aspect when you look at today's game. This not only means getting to the quarterback, but also the ability to recognize a potential screen, get extention on the offensive lineman, break free and chase down the potential runner/receiver on the screen.

Watch the video above to see these three examples using former Missouri defensive lineman Sheldon Richardson.