Miami 4–3 defense

Built around Jimmy Johnson's notion of "upfield pressure", it is a penetrating, swarming defense, with a "get there firstest with the mostest" mentality.

[1][2] The focus is to cause opponents to make mistakes, even if the defense might give up a big gain or two.

Once people realized it could be used to stop the college offenses of the day and also was successful at the NFL level, it became very popular, and started a resurgence in the use of the 4–3.

[3][7][10][11] College coaches that felt overmatched by the increasing size of offensive lines often switched.

[12] The Miami front influenced all other 4–3 defenses that followed, including the Cover 2 and the Tampa 2 schemes.