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Action at the line of scrimmage
Before breaking the huddle
Count the players
Verify—down, distance & time
Make sure defense not in neutral zone
Break huddle to snap (umpire)
Count players
Make sure who is on line of scrimmage (who is punched back, is tight end covered)
Know where the free blocking zone is
Look for numbering rules
Watch for improper handling of the ball
Disconcerting signals by defense
Break huddle to snap (linesmen)
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)
Umpire
Watch for holding, illegal blocks at line of scrimmage
Move to line of scrimmage if passing play
Line
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
Umpire
Spot ball
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