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Game Fields
The football field is 120 yards long and 53 ½ yards wide. At each end of the
field and 100 yards apart are the goal lines. The additional 10 yards at each
end is the end zone. The field is divided up every 5 yards by a yard line. The
middle yard line marker is called the 50 yard line. In parallel to the side
lines are rows of hash marks. The football is always placed on or between the
hash marks at the start of each play. This ensures that the teams have space to
line up on both sides of the football.
The position of the football that
defines the sides of the ball is called the "line of scrimmage".
There are also goal posts at the back of each football end zone. One way to score is to kick the football through the goal posts. The ball must go between the uprights and over the crossbar.
If any part of a player with the football touches outside the side lines or the end zone it is considered Out of Bounds.
There are also goal posts at the back of each football end zone. One way to score is to kick the football through the goal posts. The ball must go between the uprights and over the crossbar.
If any part of a player with the football touches outside the side lines or the end zone it is considered Out of Bounds.
Game Format:
Football is a timed sport. The team with the most points at the end of the time period, wins the game. The game is divided up into 4 periods or quarters with a long "half time" between the second and third quarter. Time is counted while plays are running and sometimes between plays (i.e. time continues after a running play where the player was tackled in bounds, but stops on an incomplete pass). To keep the game going at a good pace the offense has a limited time (called the play clock) between plays.
Football Players:
The rules in football allow each team to have eleven players on the field at a time. Teams may substitute players between plays with no restrictions. Each team must start a play on their side of the ball.
The rules in football allow each team to have eleven players on the field at a time. Teams may substitute players between plays with no restrictions. Each team must start a play on their side of the ball.
Football Penalties:
There are many rules and penalties that are enforced during a football game. Most football penalties result in a loss or gain of yardage depending on whether the penalty is against the offense or the defense. The severity of the penalty determines the number of yards. Most penalties are 5 or 10 yards, but some personal foul penalties result in 15 yards. Also, pass interference can result in a penalty that matches the length of the intended pass. The team that did not commit the penalty has the right to decline the penalty. We won't list or detail every possible football infraction, but here are some of the more common football penalties:
False Start
When a football player on the offense moves just prior to the snap. This is a five yard penalty. Note that one back on the offense can legally be "in motion" at the time of the snap.
Offside
If a player from the offense or defense is on the wrong side of the line of scrimmage at the time of the snap. A defensive player can cross the line of scrimmage as long as they get back before the snap, but if they touch an offensive player they can be called for encroachment.
Holding
When a player grabs a football player without the ball with the hands or hooks him or tackles him.
Pass Interference
When a defender contacts a pass receiver after the ball is in the air to prevent him from catching the ball. This is up to the referee to determine. If the contact is before the ball is in the air it will be called defensive holding. Note that pass interference can also be called on the offense if the defender has position and is trying to catch the ball.
Face mask
To protect the football players, it is illegal to grab another player's facemask.
Roughing the Passer or Kicker
To protect kickers and quarterbacks, who are very vulnerable when they are passing or kicking the ball, players are not allowed to run into them after the ball has been thrown or kicked.
Intentional Grounding
When the passer throws a pass nowhere near an eligible receiver strictly to avoid being sacked.
Ineligible Receiver Downfield
When one of the offensive players that is not an eligible receiver is more than 5 yards downfield from the line of scrimmage during a forward pass.
There are many rules and penalties that are enforced during a football game. Most football penalties result in a loss or gain of yardage depending on whether the penalty is against the offense or the defense. The severity of the penalty determines the number of yards. Most penalties are 5 or 10 yards, but some personal foul penalties result in 15 yards. Also, pass interference can result in a penalty that matches the length of the intended pass. The team that did not commit the penalty has the right to decline the penalty. We won't list or detail every possible football infraction, but here are some of the more common football penalties:
False Start
When a football player on the offense moves just prior to the snap. This is a five yard penalty. Note that one back on the offense can legally be "in motion" at the time of the snap.
Offside
If a player from the offense or defense is on the wrong side of the line of scrimmage at the time of the snap. A defensive player can cross the line of scrimmage as long as they get back before the snap, but if they touch an offensive player they can be called for encroachment.
Holding
When a player grabs a football player without the ball with the hands or hooks him or tackles him.
Pass Interference
When a defender contacts a pass receiver after the ball is in the air to prevent him from catching the ball. This is up to the referee to determine. If the contact is before the ball is in the air it will be called defensive holding. Note that pass interference can also be called on the offense if the defender has position and is trying to catch the ball.
Face mask
To protect the football players, it is illegal to grab another player's facemask.
Roughing the Passer or Kicker
To protect kickers and quarterbacks, who are very vulnerable when they are passing or kicking the ball, players are not allowed to run into them after the ball has been thrown or kicked.
Intentional Grounding
When the passer throws a pass nowhere near an eligible receiver strictly to avoid being sacked.
Ineligible Receiver Downfield
When one of the offensive players that is not an eligible receiver is more than 5 yards downfield from the line of scrimmage during a forward pass.
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