The key differences in technique between a 3-technique and a 5-technique defensive lineman in football lie in their alignment and responsibilities. A 3-technique lines up on the outside shoulder of the offensive guard and focuses on penetrating the line of scrimmage to disrupt plays. A 5-technique lines up directly across from the offensive tackle and is responsible for controlling the gap between the tackle and tight end, often requiring more strength and the ability to set the edge against the run.
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