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| In Bounds |
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The region of the field inside the sidelines and end lines.
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| Incomplete Pass |
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A forward pass that touches the ground before being caught.
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| Intentional Grounding |
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A foul called against a quarterback who purposely throws an incomplete forward pass solely to avoid a sack; cannot be called if the pass lands at or beyond the line of scrimmage.
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| Interception |
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A pass caught in the air (picked off) by a defender whose team immediately gains possession of the ball and becomes the offense.
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