Basketball - Contact

Legal screens depend on position, timing, and contact.

A screen, often called a pick, is a legal way to delay or redirect a defender. It becomes illegal when the screener creates unfair contact by moving into the opponent, setting up too close, leaning, extending an arm or leg, or taking away the opponent's chance to avoid the contact. Officials judge the screener's position, timing, movement, and the defender's path.

Quick ruling: "moving screen" is shorthand, not the full rule. A screener may move legally in some situations, but cannot move into the opponent at the moment of contact or set a screen so close that the opponent has no fair opportunity to stop or change direction.

Definition

What a screen is

A screen is a legal action by a player who uses position, without causing undue contact, to delay or prevent an opponent from reaching a desired spot. In ordinary basketball language, a pick is the same idea: one player positions their body so a teammate can drive, shoot, cut, or receive a pass with more space.

The rule does not reward every collision near a screen. The official first asks whether the screener got to a legal position and whether the opponent was given the space and time the rulebook requires. If the defender runs into a legal screen, the contact may be incidental or may be the defender's foul. If the screener causes illegal contact, it is an illegal screen.

Decision path

How officials judge it

Identify who created the contact: the screener, the defender fighting through, or both players.
Check whether the screener established a legal position before the opponent arrived.
Ask whether the opponent was stationary, moving, aware of the screen, or blind to it.
Judge the distance given. A moving opponent usually needs more space than a stationary opponent.
Look for illegal movement or body extension at contact: sliding, leaning, hip-checking, sticking out a knee, widening the stance, or using the arms to hold.
Apply the penalty only after deciding whether the illegal act was by the screener, the defender, or another player.

Legal screens

What makes a pick legal

Position comes first: the screener must get to the spot before contact, not arrive through the defender's path as the defender is already there.
The body must stay within a normal stance: a player may be wide enough to stand naturally, but cannot create extra contact by extending elbows, arms, hips, knees, or legs.
Awareness matters: a screen set in front or to the side of an opponent who can see it is judged differently from a blind screen from behind or outside the opponent's field of vision.
Speed matters: a defender moving quickly needs enough distance to stop or change direction. The faster the opponent is moving, the more space a legal screen generally requires.
Contact alone is not illegal: a legal screen can still create contact if the opponent has a fair chance to avoid it and chooses or fails to do so.

Illegal screens

What makes a pick illegal

An illegal screen usually happens when the screener does more than hold a legal position. The common examples are stepping into the defender's route at the last moment, continuing to slide sideways into the defender, leaning the shoulder or hip into the defender, turning into contact, or using the arms to hold or redirect the defender.

Blind screens are a frequent source of whistles. If the defender cannot reasonably see the screen coming, the screener must allow enough space for the defender to avoid a hard collision. A screen set directly behind a stationary player with no step of space, or directly in the path of a moving player with no time to react, is much more likely to be illegal.

Movement

Why "moving screen" is not the whole test

Fans often say every moving screen should be a foul, but that is too broad. A screener may be allowed to move in the same direction and path as the opponent, reposition before contact, or slip out of a screen before contact occurs. Movement becomes a problem when it creates illegal contact or removes the opponent's fair chance to avoid the screen.

The timing is the key. If the screener is still moving laterally or forward into the defender at the moment of contact, officials are more likely to call the screen illegal. If the screener moves away, rolls to the basket, or never makes illegal contact, there may be no foul at all.

Off-ball contact

How defenders can also foul

Not every whistle near a screen is on the screener. A defender can foul by grabbing the cutter, pushing through the screener, holding the screener's arm or jersey, extending an arm bar, or knocking the screener down after the screener has established legal position.

Officials also watch for defenders who exaggerate or initiate contact to sell an illegal-screen call. Falling after a screen does not prove the screen was illegal. The official still has to decide who caused the displacement and whether either player used illegal hands, hips, legs, or body movement.

Common plays

How to read screen actions

Pick-and-roll: the screen is legal if the screener establishes position before contact and then rolls or slips without displacing the defender illegally.
Dribble handoff: the handoff player cannot turn into a defender like a blocker. If they keep moving into the defender's path and cause contact, it can be an illegal screen.
Off-ball down screen: a screener may free a teammate for a cut, but cannot widen the stance, lean, or hold the defender as the defender tries to trail.
Back screen: because the defender often cannot see it, the screener must give enough space to avoid severe blind-side contact.
Rescreen: changing the screening angle is legal only if the screener gets to the new position before contact and does not slide into the defender.

Penalty

What happens after an illegal screen

An illegal screen is normally a personal foul on the screener. In the common offensive-screen situation, the result is often a turnover and a throw-in for the other team. Whether the foul counts toward team totals, whether free throws can result, and how the ball is put back in play depends on the competition's rulebook and game situation.

If the defender commits the illegal contact instead, the penalty follows the ordinary defensive-foul rules. That may mean a throw-in, free throws, or another restart depending on shooting status, team-foul penalties, and the active code.

Misunderstandings

Common arguments

"The screener was moving, so it is automatically illegal" is incomplete. Movement matters when it creates illegal contact or removes the opponent's chance to avoid the screen.
"The defender ran into him, so it must be legal" skips the setup. If the screener got there late or too close, the screener may still be responsible.
"A pick must be completely still" is too simple. A screener can reposition before contact and can sometimes move with the opponent's path.
"No one fell down, so there is no foul" is wrong. Holding, hip checks, leg extension, and small displacements can still create an advantage.
"Illegal pick" and "illegal screen" are different calls" is usually just a terminology issue. Rulebooks generally use screen language, while players and broadcasters often say pick.

Official references