"Worthy [a Defensive Lineman the patriots recently traded for a late round pick] looks like he would be best as a one-gap penetrator in a 4-3 defense. He could play the three-technique in a Tampa-2 defense that requires a quick tackle to fire through the gap. Worthy is at his best when he is trying to get into the backfield to make plays. ... 

While Worthy probably is a better fit in a 4-3 defense, he could play the five-technique as an end in a 3-4. His ability to hold his ground could set the edge and free up outside linebackers. However, that may not be the best use of his talents." 

this kind of analysis makes me hard, even though I don't understand a word of it.