A moving screener is not automatically illegal under NBA rules.

The ruleset used on this page

The primary rulings apply the National Basketball Association's 2025–26 Official Playing Rules, especially Rule 4, Section X (definition of a screen), Rule 12B, Sections I and III (personal contact and screening), and Rule 12B, Section VII (offensive-foul penalty). This was the latest season-labelled NBA rulebook available from NBA Official when checked on 26 August 2026.

A separate comparison applies the FIBA Official Basketball Rules 2024 v1.0a, valid from 1 October 2024 and still controlling on the check date. FIBA has already published its 2026 v1.1 book for 1 October 2026; the Article 33.7 screening test quoted here is unchanged in that future edition. WNBA, NCAA, NFHS, youth and local rules are not treated as interchangeable with either code.

“Pick” is informal; “screen” is the rulebook term

NBA Rule 4, Section X defines a screen as a legal action that, without undue contact, delays or prevents an opponent from reaching a desired position. Players and broadcasters commonly call the same tactic a “pick.” There is no separate NBA foul named “illegal pick.”

A screen can occur on the ball in a pick-and-roll, away from the ball on a cut, during a dribble handoff, or as a second screen set at a new angle. The play's tactical name does not change the contact test.

Distance depends on what the opponent can see and do

NBA Rule 12B-III and the NBA's Comments on the Rules separate three situations:

• Front or side of a stationary opponent: the screener may be as close as desired if no contact is made while taking the position. The opponent can see the screen and is expected to go around it.
• Behind a stationary, unaware opponent: the screener must leave at least a normal step. This gives the opponent room to step backward and change direction without immediate contact.
• In the path of a moving opponent: the screener must stop soon enough to let the opponent avoid contact. Rule 12B-III says the required stationary position may be one to two normal steps or strides away; the opponent's speed decides where within that range.

The measurements apply when the position is established, but responsibility is decided through the contact. A defender who then runs into a legally established and maintained screen is responsible for that contact.

What the NBA's same-path permission really means

After establishing a legal position, an NBA screener may not move laterally or toward the opponent being screened. The rule does permit movement in the same direction and path as the opponent. The NBA's official commentary narrows that example: both opponents must already have been moving in an identical direction and path before contact; the trailing player is then responsible for contact.

The player in front may stop or slow, but may not move backward or sideways into the trailing opponent. That is why “the screener's feet were moving” is not a complete NBA analysis. The replay must show the direction of both players before contact, not merely freeze on a lifted foot.

Legal feet do not excuse an extended body part

Position and distance are only part of the ruling. NBA Rule 12B-I prohibits holding, pushing, charging into or impeding an opponent by extending a hand, arm, leg or knee, or by bending the body into an abnormal position. Contact that reroutes an opponent is a foul under that section.

A screener therefore cannot widen the screen at the last instant with a hip, shoulder, elbow, knee or foot; clamp the defender with an arm; or turn into the defender to continue the block. Conversely, a defender may be responsible for grabbing, pushing or dislodging a screener who legally reached and maintained the position. Falling down is evidence of displacement, not a rule test by itself.

A bad screening angle is not automatically a personal foul

A screening foul is a personal-contact ruling. A player can start toward a late screen, slip to the basket, and avoid all contact; officials do not call a personal foul merely because the attempted screen would have been illegal had the collision occurred. The screener may also abandon the action and establish a fresh position that satisfies the time-and-distance test before later contact.

There is a specific NBA exception outside the contact rule: Rule 10, Section XIV prohibits an offensive player from leaving the court across the frontcourt endline to set a screen. That is a violation and loss of possession even though no screening contact is required.

How to judge an NBA screen replay

1. Identify the screen and contact. Which player delayed the opponent, and was the contact material rather than negligible or incidental?
2. Classify the opponent. Stationary or moving; able to see the screen or unaware of it?
3. Check the initial gap. No required gap at the visible front or side if the screener arrives without contact; one normal step for a blind screen on a stationary opponent; one to two steps or strides for a moving opponent, according to speed.
4. Track both paths. Did the screener hold the position, move laterally or toward the opponent, or satisfy the narrow same-direction, same-path rule?
5. Check the whole body. Look for a lean, turn, hold or extension outside a normal position.
6. Assign responsibility and status. Screener's foul, defender's foul, incidental contact or play on; then determine whether it is an offensive, defensive or other personal-foul situation.

Pick-and-rolls, handoffs, slips and rescreens

• Pick-and-roll: contact on the original screen uses the ordinary position and movement test. The roll is a new movement; the screener cannot turn the hip or shoulder through the defender to begin it.
• Dribble handoff: the passer may hand over the ball and continue moving, but cannot use that continuation to step or pivot into the defender's path and cause illegal contact.
• Slip screen: leaving before contact is normally play on. The fact that the screener never became stationary is not by itself an NBA personal foul.
• Back screen: if the stationary opponent cannot see it, the normal-step protection applies. A hard collision does not become legal merely because the screener planted both feet.
• Rescreen: changing the angle is legal if the screener clears the opponent and establishes the new position with the required time and distance before the next contact.

What happens when the screener is called

For an ordinary illegal screen by an offensive player, NBA Rule 12B-VII applies the offensive-foul penalty: no points can be scored by the offensive team, the screener receives a personal foul, the team does not receive a team foul, and no penalty free throws are awarded. The opponents receive a sideline throw-in nearest the interruption, but no nearer the baseline than the free-throw line extended.

“Illegal screen” does not by itself settle every penalty. If the offending player is not an offensive player in the relevant foul status, the ordinary personal- or loose-ball-foul provisions control instead. Unnecessary contact can be upgraded to Flagrant 1; unnecessary and excessive contact can be Flagrant 2, with separate free-throw, possession and ejection consequences under Rule 12B-IV.

A called screen foul can be challenged; a non-call cannot

Under 2025–26 NBA Rule 14, a team may use a Coach's Challenge on a called personal foul charged to its own team. An illegal-screen call therefore can be challenged if the procedural requirements are met. A screen non-call is not independently challengeable: Rule 14 expressly excludes non-calls from the list of challengeable events.

Replay availability does not change the on-court test. The review asks whether the called personal foul should remain assigned, be removed or be assigned differently under Rule 14's reviewable matters.

FIBA does not use the NBA's same-path permission

FIBA 2024 Article 33.7 defines screening as delaying or preventing an opponent without the ball from reaching a desired position. For a legal screen, the screener must be stationary inside that player's cylinder and have both feet on the court when contact occurs. If the screener is moving when contact occurs, FIBA lists the screen as illegal.

The distance rules are otherwise familiar: a visible front or lateral screen on a stationary opponent may be as close as possible without contact; a screen outside that opponent's field of vision must allow one normal step; and a moving opponent must receive enough space to stop or change direction, never fewer than one and never more than two normal steps.

NBA and FIBA record an offensive screen differently

In both codes, the usual practical result of a team-control screen foul is loss of the ball and a nearby throw-in for the opponents, not bonus free throws. The record is different:

• NBA 2025–26: an ordinary offensive foul is a personal foul on the screener but is not charged as a team foul; no penalty free throws are awarded.
• FIBA 2024: the screener's personal foul counts among the team's fouls under Article 41.1.1, but a foul by the team controlling or entitled to the ball is still penalised with an opponents' throw-in rather than the two-free-throw team-foul penalty (Articles 17.2.5 and 41.2.2).

If the defender illegally holds, pushes or dislodges a legal screener, each code instead applies its defensive-foul and team-penalty rules to that contact.

A blind back screen is set half a step away

Situation: Blue 5 stands directly behind a stationary, unaware defender, leaving only half a normal step. The defender steps backward and collides with Blue 5.

NBA 2025–26 ruling: illegal screen on Blue 5. Rule 12B-III requires a normal step for a stationary opponent unaware of the screen. The decisive fact is the insufficient blind-side distance, not whether Blue 5's feet were planted at contact.

A late rescreen catches a fast defender

Situation: Blue 5 changes the screening angle and stops one stride from a defender sprinting toward the ball. The defender has no realistic chance to stop or turn before contact.

NBA 2025–26 ruling: illegal screen. A moving opponent may require one to two normal steps or strides according to speed. The screener stopped, but did not stop soon enough.

Two players are already running on one path

Situation: Blue 5 and Red 3 are moving in the same direction on an identical path, with Blue 5 in front. Blue 5 slows without stepping backward or sideways; Red 3 runs into Blue 5 from behind.

NBA 2025–26 ruling: Red 3 is responsible for the contact under the NBA Comments on the Rules. This is the narrow fact pattern behind the same-path permission. If Blue 5 slides sideways into Red 3 instead, the ruling changes.

The handoff player is still turning at contact

Situation: Blue 4 hands the ball to a teammate and continues pivoting across Red 6's route. Contact occurs while Blue 4 is moving.

FIBA 2024 ruling: illegal screen under Article 33.7. The decisive fact is that the screener was moving when contact occurred. The NBA's same-direction, same-path sentence cannot be imported into this FIBA ruling.

The screener slips before anyone makes contact

Situation: Blue 5 approaches for a screen, sees the defender change route and cuts to the basket before contact. The defender is not held, rerouted or displaced.

NBA 2025–26 ruling: play on, assuming no separate violation. The movement alone did not create a screening personal foul. If Blue 5 later rescreens, the new position is judged separately.

Claims that miss the actual test

• “Any moving screen is a foul.” Too broad for the NBA; true at FIBA contact only in the sense stated by Article 33.7. Name the ruleset first.
• “Both feet were set, so it was legal.” Not if the screen was blind and too close, late against a moving opponent, or widened by an extended body part.
• “The defender caused the collision.” A defender can initiate contact yet still be protected because the screener arrived too late or gave too little distance.
• “A fall proves the foul.” Officials judge legal position, direction and displacement; a fall does not decide those facts.
• “An offensive screen puts the opponent in the bonus.” Not under either penalty explained here: the NBA does not count the ordinary offensive foul as a team foul, while FIBA counts it but preserves the throw-in penalty for a team-control foul.

Governing-body sources and effective versions

• National Basketball Association — 2025–26 Official Playing Rules: Rule 4-X; Rule 10-XIV; Rule 12B-I, III, IV and VII; Rule 14-I–III; Comments on the Rules A.3
• NBA Official — live Rule No. 12, Fouls and Penalties: Rule 12B, Section III, By Screening
• FIBA — Official Basketball Rules 2024 v1.0a, valid 1 October 2024: Articles 17.2.5, 33.7, 33.9, 34 and 41
• FIBA — official rules download index: current 2024 documents and 2026 documents effective 1 October 2026
• FIBA — Official Basketball Rules 2026 v1.1, valid 1 October 2026: future-effective Article 33.7

Checked on 26 August 2026. The season-labelled NBA 2025–26 PDF controls the primary explanation; the undated live NBA page is an accessible section-level companion. FIBA 2024 remains effective through 30 September 2026, and the separately labelled FIBA 2026 edition becomes valid on 1 October 2026. WNBA, NCAA, NFHS, 3x3, wheelchair, youth and domestic competition rules require separate checking.