Football's Offensive Team: Formations for Running Backs
An offensive formation in a football game is how the offense aligns all 11 of its players prior to using a particular play. A team can run or pass out of many formations, but these three backfield formations focus specifically on running backs. Here’s a breakdown of what the three formations look like:
Split-back formation: The runners are aligned behind the two guards about 5 yards behind the line of scrimmage.
Teams use this formation because it’s difficult for the defense to gauge whether the offense is running or passing. With split backs, the backfield is balanced and not aligned toward one side or the other, making it more difficult for the defense to anticipate what the play will be. This formation may be a better passing formation because the backs can swing out of the backfield to either side as receivers.
I formation: The tailback (TB) — the runner who will carry the ball — can place himself as deep as 7 yards from the line of scrimmage.
By stepping this far back, the runner believes he’ll be in full stride when he nears the line of scrimmage. Consequently, the I formation is ideally suited to a team with a great running back. Also, the depth allows him to have complete vision of his blockers and the defensive players’ first reaction to the run. This formation is called the I because the quarterback (QB), fullback (FB), and tailback form an I, with the fullback between the quarterback and tailback.
Offset I formation: The running back (RB) remains deep, 5 to 7 yards from the quarterback. When the running back is this deep, the majority of the time the team plans to run the ball. The fullback (FB) or blocking back can be as close as 3 yards to the line of scrimmage.
The other back wants to be close to his target: the defender he must block. A good fullback needs only 2 yards before making blocking contact. Also, he’s deep enough in case the play requires him to go in motion to either side and swing to the outside for a possible reception. The fullback can be set to the strong side or the weak side of the formation.

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ACC
The Atlantic Coast Conference of college football teams.

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AFC
An acronym for the American Football Conference.

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AFL
An acronym for the American Football League.

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BCS
An acronym for the Bowl Championship Series.

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Big Ten
A college athletic conference whose eleven-member institutions are located mainly in the Midwestern United States.

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bye week
A week during which an NFL team doesn’t play; every NFL team has one week of the season off.

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center
The player who snaps the ball to the quarterback. A center handles the ball on every play.

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DEF
An acronym for Team Defense.

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fullback
A player who’s responsible for blocking for the running back and also for pass-blocking to protect the quarterback. Fullbacks, who are generally bigger than running backs, are short-yardage runners.

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kicker; placekicker
The member of the special team who is responsible for field goal and extra point attempts.

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NCAA
An acronym for the National Collegiate Athletic Association.

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NFC
An acronym for the National Football Conference.

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NFL
An acronym for the National Football League.

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Pac-10
The Pacific-10 Conference is a college athletic conference that operates in the western United States.

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Punt
A kick to the opponent without the use of a tee.

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quarterback
The leader of the team. The quarterback calls the plays in the huddle, yells the signals at the line of scrimmage, and then receives the ball from the center. Then he hands off the ball to a running back, throws it to a receiver, or runs with it.

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running back; tailback; halfback; wingback
A player who runs with the football.

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SEC
The Southeastern Conference of college football teams.

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snake draft
A draft in which each fantasy coach has one pick in each round. Each team makes its first-round pick based on a predetermined order.

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ST
An acronym for Special Teams.

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stud
A top-rated fantasy football starter.

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tight end
A player who serves as a receiver and also as a blocker. The tight end lines up beside the offensive tackle to the right or the left of the quarterback.

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waivers
A situation where a player is dropped from a team roster; the player goes on waivers for a limited time before becoming a free agent. All coaches then have a set amount of time (usually two days) to decide whether to add him to their teams.

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wide receiver
A player who uses his speed to elude defenders and catch the football. Teams use as many as two to four wide receivers on every play.