Football is a team sport that involves 11 players on each team. The game has a set of rules that must be followed to ensure fair play and safety. The game was first developed in England in the middle of the 19th century as a way to keep boys occupied after school. The game was originally known as rugby, but it evolved into what is now known as American football after the rules were changed to allow forward passing in 1906.
The game is played over four downs, with the offense trying to advance the ball at least 10 yards each time. Once the offense achieves 10 yards, the next down starts at the point where the previous down ended. The nearest official blows a whistle to signal that the down is over, and the ball becomes dead (unless an incorrect official calls the play dead prematurely).
Teams change ends of the field at the end of each quarter and after any ties in the game. The winning team of a coin toss decides which team will receive the kickoff. The team that loses the coin toss may defer their choice or choose to have the losing team choose which side of the field they will defend.
There are several different ways to watch NFL games, but the most popular option is a streaming service. Streaming services offer packages that include local channels like CBS, Fox, and ABC as well as ESPN and the NFL Network so you can watch all of the action from your favorite couch. Streaming services also usually come with free trial periods so you can test them out before you commit to a subscription.
In addition to the standard players on each team, there are also special players called specialist players. These are players that have specific skills and roles to help the team succeed on a particular play. These can include wide receivers, quarterbacks, running backs, and defensive linemen. There are also players who specialize in kicking, such as placekickers and field goal kickers.
All players must wear a helmet and shoulder pads in order to play the game. There are also restrictions on how the players can move and what contact is allowed with other players and the ground.
The game is scored by kicking the ball into a goal or over a line. There are various types of goals, including corner goals and full-time goals. The scoring system is similar to rugby in that each team has a scorekeeper to keep track of the scores. Points are awarded for kicking the ball over the goal line, into a net, or through the uprights. There are also try scoring opportunities, which are worth one point, if the ball is kicked into the opposing team’s goal or over the line. Try scoring opportunities can also occur if the defense recovers a fumble within its own end zone before play is stopped. These are rare, and only occur a few times per season.