Andrew Pace
In basketball, a moving screen occurs when an offensive player moves their feet horizontally or laterally while setting a screen. It is considered an illegal move that results in an offensive foul and a change of possession. A legal screen, on the other hand, involves an offensive player blocking a defender by standing beside or behind them to free a teammate for a pass or shot attempt. This is done while keeping their feet set before and during the screen. Moving screens are only applicable during offensive possessions and can occur in on-ball or off-ball situations. The key distinction is that the offensive player must not move into the defender to create contact and gain an advantage. While there is debate about the terminology and specific interpretations, the essence of an illegal screen lies in the offensive player's movement and intent to impede the defender's progress.
| Characteristics | Values |
|---|---|
| Definition | A moving screen in basketball is when an offensive player moves their feet horizontally or laterally in the process of setting a screen. |
| Legal Status | A moving screen is an illegal move. |
| Result | An offensive foul and a change of possession. |
| Legal Alternative | A legal screen is a blocking move by an offensive player in which they stand beside or behind a defender to free a teammate to shoot a pass or drive in to score. |
| Legal Requirements | The offensive player's feet must remain set before and during the screen. |
| Illegal Requirements | The offensive player must not move towards a defender, laterally or horizontally, when setting a screen. |
| Illegal Contact | A moving screen involves prohibited contact with a defender, either by moving the feet or other body parts while the defender attempts to avoid the screen. |
| Cylinder Requirement | The screener must stay within their own cylinder or vertical plane, approximately shoulder-width apart. |
| Time and Distance | The offensive player must allow the defender enough time and distance to avoid the screen. |
| On-Ball Screening | The screener should set both feet first about shoulder-width apart and remain stationary until the defender clears. |
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What You'll Learn
Moving screens are illegal screens
A moving screen in basketball occurs when an offensive player moves their feet horizontally or laterally in the process of setting a screen. Moving screens are illegal and result in an offensive foul and a change of possession.
A legal screen is a blocking move by an offensive player who stands beside or behind a defender to free a teammate to shoot, pass, or drive in to score. The offensive player's feet must remain stationary before and during the screen. Moving screens can only occur during offensive possessions by offensive players. They happen when an offensive player moves towards a defender, either horizontally or laterally, when setting a screen. Moving screens can also occur in on-ball or off-ball situations.
A screener must stay within their own cylinder, an imaginary vertical plane, approximately shoulder-width apart while setting a screen. This cylinder includes any area of occupied space surrounding the screener or any other active player, from the floor to as high as they can jump or extend their arms. The diameter of the cylinder does not go beyond the player's hand/arm reach on the front and rear sides or beyond their legs on the sides. This means the offensive player setting the screen cannot extend any body parts to delay or prevent a defender from reaching their desired destination, typically near another offensive player.
A moving screen is a colloquial term for when a screener makes prohibited contact with a defender by moving their feet or other body parts while the defender attempts to avoid the screen by going over or under it. A moving screen is typically illegal because the screener does not remain within their own cylinder or give the defender enough time or distance to avoid the screen. A screener may swiftly move their feet to re-establish a screen, but they must still give the defender enough time and distance before making contact with the screen.
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Offensive fouls are the result
An offensive player setting a screen must stay within their own cylinder, an imaginary vertical plane approximately shoulder-width apart. The cylinder includes any area of occupied space that surrounds the screener or any other active player from the floor to as far as they can jump or extend their arms above their head. The offensive player must not extend any body parts to delay or prevent a defender from reaching their desired destination.
A moving screen occurs when the offensive player setting the screen fails to follow certain guidelines. This includes moving towards or sideways into a defender to create contact, not allowing the defender enough time and/or distance to avoid the screen, and not remaining stationary or providing enough space for defenders to avoid contact.
Illegal screens, also known as moving picks, are considered violations of the rules of fair play. They can result in fouls called on the offending team and potential injuries for both the offending player and the defender. Offensive fouls add to the team's total foul count and result in a loss of possession of the ball.
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The screener must stay within their 'cylinder'
A moving screen in basketball is an illegal move where an offensive player moves their feet horizontally or laterally while setting a screen. A screen is a blocking move where an offensive player stands beside or behind a defender to free a teammate to shoot, pass or drive in to score. The screener must not move their feet or use other body parts to make contact with the defender. The screener must stay within their "cylinder", which is an imaginary vertical plane, approximately shoulder-width apart, surrounding the player from the floor to as high as they can jump or extend their arms. The cylinder's diameter does not extend beyond the player's hands, arms or legs.
The screener must not move within this cylinder to delay or prevent a defender from reaching their desired destination, which is usually near another offensive player. This means that the screener cannot extend their elbows, forearms, legs, feet or hips to obstruct the defender's movement. If the screener does not remain within their cylinder, this is an illegal screen.
The defender must also be given enough time and distance to avoid the screen, either by going over or under it. The time and distance afforded to the defender will depend on their speed and the number of steps they can take. If the screener moves to re-establish a screen, they must still give the defender enough time and distance to avoid the screen.
In a stagger screen, for example, a defender may avoid the first screener, but the second screener then has the opportunity to move slightly to re-establish the second screen. As long as the second screener stays within their cylinder and gives the defender enough time and distance to avoid the screen, this is legal. However, if the second screener moves, especially when the defender makes contact with the screen, this is an illegal moving screen.
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Legal screens free teammates
A legal screen in basketball is a blocking move by an offensive player that helps free a teammate to either shoot a pass or drive in to score. The player setting the screen must remain stationary, with their feet set before and during the screen, and allow the defender a "reasonable opportunity" to avoid the screen. This means that the offensive player must not move into the defender to initiate contact or obstruct their movement.
To set a legal screen, the offensive player must stand within their 'cylinder'—the area of occupied space surrounding the player, from the floor to as far as they can jump or extend their arms above their head. The cylinder's diameter does not extend beyond the player's hands, arms, or legs. The screener must not extend any body parts to delay or prevent a defender from reaching their desired destination, typically near another offensive player.
Legal screens are an important tactic in basketball, allowing the offence to create an advantage and set up plays. One such play is the 'pick and roll', where the ball-handler drives to the basket while the screener squares for a jump shot. Another is the 'pick and pop', where the ball-handler drives to the basket while the screener rolls towards the basket after setting the screen.
While the rules of screening can be complex, with many screens stepping right to the edge of being illegal, understanding and utilizing legal screens is a key part of playing a clean and effective offensive game in basketball.
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Moving screens are often called in pick-up games
A moving screen in basketball is an illegal move where an offensive player moves their feet horizontally or laterally while setting a screen. This results in an offensive foul and a change of possession. Moving screens can occur during on-ball or off-ball situations and are typically called when the offensive player does not allow the defender adequate time or distance to avoid the screen.
In pick-up games, moving screens are often not called out, and players tend to deal with them in their own way. Some players may simply ignore the moving screen and continue playing, while others may gripe or make light-hearted comments to the offender, such as "Hey, stop moving on your screens" or "Don't move on your screen". This usually gets the message across without having to make an official call. Players may also return the favour by fouling the offender or teaching them how to perform a legal screen, as many players are unaware of the rules regarding fouls.
The relaxed nature of pick-up games means that there is often more leniency with moving screens, and players are generally more accepting of minor infractions. However, if a moving screen is particularly egregious, creating a significant amount of space, some players may feel compelled to address it directly or push the screen into the ball handler.
While moving screens are not commonly called in pick-up games, players have their own ways of dealing with them and maintaining a level of fairness without resorting to official calls or complaints.
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Frequently asked questions
A moving screen in basketball is when an offensive player moves their feet horizontally or laterally while setting a screen. It is an illegal move that results in an offensive foul and a change of possession. Moving screens can only be committed by offensive players.
An illegal screen, also called a blocking foul, is when the offensive player makes prohibited contact with a defender while setting a screen. This includes moving into the defender to cause contact, extending body parts to delay or prevent the defender from reaching their desired destination, or not giving the defender enough time or distance to avoid the screen.
To avoid committing a moving screen, the offensive player setting the screen must remain stationary with their feet set before and during the screen. They must also stay within their "cylinder", an imaginary vertical plane approximately shoulder-width apart, and not move sideways to prevent the defender from getting around them.
