---
slug: attached
title: Attached
depth_tier: entry
side: OFFENSE
category: Formation
source_id: "OFF-0115"
created: 2026-05-17
updated: 2026-05-17
canonical: https://learningfootball.xyz/terms/attached
aliases:
  - attached receiver
  - attached tight end
  - "on-line alignment"
  - tight alignment
---
# Attached

## Short Definition

A tight end or receiver aligned close to the formation core—affecting blocking surfaces and run fits, as opposed to a detached player split wide.

## Definition

An attached player is a tight end or eligible receiver aligned close to the core of the offensive formation—near the tackles, in a wing position, or just outside the line—in a position that adds to the formation's blocking surface and immediate run-fit threat. Attached alignment changes what the defense must account for: an attached tight end creates an extra gap on his side of the formation, requires the defense to set a specific run fit against his potential blocking, and eliminates the space that detached receivers create by splitting wide.

The attached player's dual identity as blocker and receiver is what makes attached alignment tactically significant. A detached wide receiver is almost exclusively a pass threat—his alignment wide communicates pass intent and rarely contributes to the run game's blocking surface. An attached tight end can block, release into a route from a compressed alignment, or flex out into motion to convert from attached to detached pre-snap. This versatility forces the defense to account for his blocking presence on every run play while also covering him as a receiver on every pass play.

Attached alignment affects the defense's run fit directly. When the tight end is attached on the right side, the defense must fit a defender into the gap his presence creates—typically a Sam linebacker or an overhang safety aligns to that side to handle the run gap. If the tight end detaches or goes in motion, that defender must redirect or risk being misaligned. Offenses use attached-to-detached motion specifically to create defensive alignment problems—the defender who was fitting the attached tight end's gap now has no one to fit, and the defense must rotate coverage to account for the detached receiver's new threat.

Nub tight end formations—a single attached tight end with no receiver outside him—present the most concentrated attached surface in modern football. Against a nub, the defense must stack a linebacker against the tight end's blocking while also covering him in the passing game, a matchup the tight end's size advantage typically favors.

## Example

"Tight end aligned just outside the right tackle—attached. Defense sets the Sam linebacker to that side to fit the gap. Tight end goes in motion wide before the snap—he's detached now. Sam linebacker has to redirect. The offense just created a coverage problem from a formation adjustment."

## Common Confusion

Attached does not mean on the line of scrimmage. A player can be attached—close to the core of the formation—while still aligning as a backfield player or in a wing position slightly off the line. What defines attached is proximity to the formation's interior, not exact on-line alignment. A tight end aligned one yard outside the tackle in a wing is attached; a tight end aligned 10 yards wide near the numbers is detached even if he is technically on the line of scrimmage.

## Related

- detached
- formation
- personnel
- tight-end
- surface
- strength
- motion
- nub

---
Source: https://learningfootball.xyz/terms/attached