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The Slotback (SB) is used in the Flexbone formation

Slotback, also called S-back or A-back, is a position in gridiron football. The "slot" is the area between the offensive tackle and the wide receiver. A player who lines up between those two players and behind the line of scrimmage fills that "slot".

The slotback position is a fixture of Canadian football and indoor football where they act as extra receivers. It is also used in American football where the position requires a versatile player who must combine the receiving skills of a wide receiver, the ball-carrying skills of a running back, and the blocking skills of a tight end.[1]

Slotbacks are often as many as five yards behind the line of scrimmage when the ball is snapped. In both the Canadian and indoor game, slotbacks can make a running start toward the line of scrimmage before the snap. In most forms of American football this would be called illegal motion, although a few professional leagues such as the World Football League, and XFL allowed forward motion. In modern NFL, the slotback is often referred to as the "flex" position.


Slotbacks are primarily used as hybrid running backs/receivers, but are often used to provide pass protection on blitzes and blocking as required on running plays. They are preferred over the wide receiver or tight end for receiving short passes or hand-offs due to their position being closer to the quarterback. When formations containing slotbacks are used in American football, the team often has to go without a tight end, a fullback, or a running back due to there being only 11 men on the offense and 7 being on the line of scrimmage. This is one reason that slotbacks are rarer in the American game.

However, as NFL teams have increasingly "defaulted to three- and four-receiver sets" in recent years, the slot receiver has become a fixture of American football formations.[2] In terms of a depth chart, a slotback is typically considered the third wide receiver and may be expected to be a "possession receiver" that can reliably catch a pass when covered by a safety, since they are most commonly used when converting medium-distance third-down conversions.

Slotbacks are used effectively in flexbone formations where they are used as extra receivers. Slotbacks are usually smaller and faster players and are used for short passes and short runs to get extra yards or a first down or third down drive.

It is important to note that players are not drafted to become slotbacks in the NFL. This position is filled as needed by a wide receiver or running back with the necessary skill-set to effectively play the position. Slotbacks must be able to block, catch, and evade tacklers while still being highly productive. In 2019, the Navy Midshipmen football team had a highly productive season when their slotbacks gained over 1,500 all-purpose yards.[3]

In Canadian football, slotbacks are basically the same as wide receivers, except that they line up closer to the quarterback and can use the waggle (motion before the snap). They rarely block or run the ball and are almost always sent out to receive passes.


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As the NFL shifted to a pass-heavy league over the past few years there has been an increase in the number of slotbacks. Some prime examples are the recently retired Darren Sproles and Larry Fitzgerald, along with active player Christian McCaffrey.

Fitzgerald extended his football career by moving from an outside receiving position into the slot. Here he was able to use his quick change of direction in tandem with his willingness to block to still be an effective member of the offense.[4]

McCaffrey entered the NFL in 2017 and put up over 1,000 yards from scrimmage in four of his first six seasons. In fact, in 2019 he totalled a thousand yards running and a thousand yards receiving, with many of those receiving yards coming from the slotback position.[5]

Darren Sproles was never a prolific running back, but his statistics show that he was an effective slotback. His 2011 season is particularly representative of how a slotback can function successfully. He ran the ball 87 times and he added 86 receptions for over 1,300 yards from scrimmage and 9 touchdowns[6]

Slotbacks are very important in the CFL, where most formations include 3 slotbacks and 2 wide receivers in a 5-receiver set. In the TSN Top 50 CFL Players, four of the top players in league history were slotbacks: Allen Pitts, Milt Stegall, Ray Elgaard, and Terry Vaughn. These players were typically the most reliable receivers on their team.

In American football, slotbacks are labeled as wide receivers on depth charts.[7]

See also


  1. ^ Association, American Football Coaches (2000). Offensive football strategies. Human Kinetics. ISBN 9780736001397.
  2. ^ "The NFL's 11 best slot defenders". June 2019.
  3. ^ Wagner, Bill (29 November 2019). "Navy slotback corps has been quite productive". Retrieved 2020-04-19.
  4. ^ "Larry Fitzgerald And The Increased Importance Of The Slot Receiver". Retrieved 2020-04-19.
  5. ^ "Christian McCaffrey Stats". Retrieved 2020-04-19.
  6. ^ "Darren Sproles Stats". Retrieved 2020-04-19.
  7. ^ Alder, James. "What's the Slot in Football? Here's an Easy Explanation". LiveAbout.