Alex Means, D-Line Coach, Air Force
View the entire video on Glazier Drive: D-Line Transition Fundamentals
The video is one lesson of 11 in the Alex Means D-Line System
This article was originally posted on the Glazier Coaching Blog.
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DEFENSIVE LINE TRANSITION FUNDAMENTALS TRAINING
This video focuses on teaching defensive linemen how to transition their eyes and techniques during plays, emphasizing the critical shift from primary to secondary reads. The instructor explains that while coaches may have established techniques (the “how”), players must understand what needs to be accomplished (the “what”) through proper eye discipline.
PASS RUSH TRANSITIONS
Approximately two-thirds of pass rush repetitions occur on first and second downs, typically involving play-action passes. The instructor emphasizes transitioning to “matching the hand” – batting down passes – which can be as valuable as sacks for getting offenses off the field in crucial situations.
EDGE PLAYER DEVELOPMENT
Multiple drill progressions are shown for defensive ends, starting with air drills to build foundational movement, then advancing to complex scenarios. The video demonstrates three-read progressions where edge players transition their eyes from one offensive player to another, then to the backfield.
SPECIFIC DRILL APPLICATIONS
The instructor presents technique-specific drills including spill drills using heavy sleds and shuffle squeeze drills for “double duty” ends who must handle both quarterback and dive responsibilities. Each drill emphasizes proper eye transition from primary keys (like the tip of an offensive tackle’s pad) to secondary reads in the backfield.
GAME APPLICATION
Game footage shows how practice drills translate to actual play, demonstrating successful execution of transition fundamentals that result in tackles for loss. The final section covers complex scenarios involving slice blocks and counter plays, where defensive ends must read multiple keys and make split-second decisions about technique execution.