Encroachment (gridiron football)

In gridiron football, encroachment refers to when before the snap, a defensive player illegally crosses the line of scrimmage and makes contact with an opponent or has a clear path to the quarterback. In high school, this includes any crossing of the neutral zone by the defense, whether contact is made or not. It is a violation of the game's code. It is similar to offside except when it occurs, the play is not allowed to begin. Like offside violations, the violating team is penalized 5 yards.^[1]^[2]

The head linesman has the duty of watching out for encroachment and other similar infractions, and the line judge assists in this process.^[3]

References

↑ Beacom, Mike. The Complete Idiot's Guide to Understanding Football.
↑ NIRSA. 2009 & 2010 NIRSA Flag & Touch Football Rules Book & Officials' Manual-14th ... p. 39.
↑ Long, Howie; Czarnecki, John. Football for Dummies. pp. 42–43.

Gridiron football concepts

Codes

Levels of play

Field

Lines	Goal line Line of scrimmage Out of bounds Sidelines Hash marks

Zones	End zone Red zone Neutral zone Field goal range Flat Passing pocket

Equipment

Helmet	History Winged Eyeshield Revolution

Positions

Offense	Backfield: Quarterback Dual-threat triple-threat Game manager System Running backs Halfback Fullback H-back Slotback Receivers Eligible Wide receiver Tight end End Linemen Center Guard Tackle

Defense	Linemen Defensive tackle Defensive end Linebacker Defensive back Cornerback Safety Nickelback Dimeback Halfback

Special teams	Placekicker Punter Kickoff specialist Long snapper Holder Punt returner Kickoff returner Return specialist Gunner Jammer Upback

Other	History Utility player Skill position Platoon system

Maneuvers

Offense	Snap Hand-off Blocking Spiral Routes Pump fake Juke Lateral Stiff arm Scramble Shift Motion Zone blocking

Defense	Tackle Stunt Shooting the gap Double coverage

Play types

Offense

Rush	Keeper Bootleg Sneak Dive Counter Counter trey Off-tackle End run Option Power Sweep Trap Veer Zone run

Pass	Incomplete Checkdown Screen Drop-back Hail Mary Alley Oop

Defense

Special teams

Other

Scoring

Statistics

Practice

Celebrations

Officiating

Miscellaneous

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