Before breaking the huddle
Count the players
Verify—down, distance & time
Make sure defense not in neutral zone
Break huddle to snap
Establish neutral zone with stance
Count players
Read keys to determine your receiver(s) of responsibility
Count players on the line, must be 7 (look at back field)
Watch players in motion-follow all the way
Player movement-false starts, encroachment, illegal shifts
At the snap
Determine run or pass (read blockers and keys)
Watch wide-out blocking and end of line play
Be ready to react to sweep your way
Cover your receivers on a pass
After the play
Line
Mark forward progress
Watch for late hits, unsportsmanlike penalties
Get box and/or chains set
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