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The Miami 4–3, also called the 4–lslide, is a scheme closely associated with the Jimmy Johnson-led Miami Hurricanes, and taken by Johnson to the Dallas Cowboys. Built around Jimmy Johnson's notion of "upfield pressure", it is a penetrating, swarming defense, with a "get there firstest with the mostest" mentality.
Early in the history of the National Football League, teams stacked the defensive line of scrimmage with seven linemen, typically using a 7-diamond or the 7-box. [1] With the liberalization of the forward passing rules in 1933, the defenses began to evolve along with the offensive changes, and by the later 1930s, the standard defense in the NFL and college was the 6–2.
The 3–4 defense was originally devised by Bud Wilkinson at the University of Oklahoma in the late 1940s. [18] Former Patriots and Oklahoma coach Chuck Fairbanks is credited with being a major figure in first bringing the 3–4 defense to the NFL in 1974. [19]
The Seattle Cover 3 is a Cover 3 defense crafted by Seattle Seahawks coaches Pete Carroll and Dan Quinn that helped the team reach Super Bowls in 2013 and 2014, winning XLVIII. [1] The defense used a 4-3 base formation while incorporating 3–4 defensive principles using a hybrid defensive end - linebacker position known as the Leo. [ 2 ]
A drill chuck is a specialised self-centering, three-jaw chuck, usually with capacity of 0.5 in (13 mm) or less, and rarely greater than 1 in (25 mm), used to hold drill bits or other rotary tools. This type of chuck is used on tools ranging from professional equipment to inexpensive hand and power drills for domestic use.
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