
In basketball, the backboard is considered out of bounds if the ball touches the back or supports of the backboard, or passes over it. This rule is often misunderstood, as some believe that the ball is only out of bounds if it touches the top of the backboard and bounces back. However, the ball can be out of bounds if it touches any part of the backboard or passes behind it. This rule also applies to the NBA, where Rule No. 8 specifies that the ball is out of bounds when it touches any object above the playing surface or the back of the backboard.
| Characteristics | Values |
|---|---|
| Ball touching the backboard | Out of bounds if it touches the supports, back, or bottom of the backboard. If the ball touches the sides or top and rebounds, it is still in play. |
| Ball passing behind the backboard | Out of bounds if it passes directly behind the backboard. |
| Ball touching a player | Out of bounds if it touches a player who is out of bounds or any other person. |
| Ball touching the floor or objects | Out of bounds if it touches the floor or any object on, above, or outside of a boundary. |
| Ball interfered by opponent | If the opponent is seated on the bench or standing on the sideline, the ball is awarded to the offended team out of bounds nearest the spot of violation. |
| Throw-in rules | The ball must be released within 5 seconds of receiving it. No player can cross the boundary line before the ball is thrown in. If the ball is not touched by a player and goes out of bounds, it is returned to the original throw-in spot. |
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What You'll Learn

The ball touching the underside of the backboard
There is some discrepancy in the sources regarding whether the ball touching the underside of the backboard is considered out of bounds. Some sources claim that if the ball touches the underside of the backboard, it is out of bounds. This is supported by a Reddit user who mentions that during a tournament, the ball hitting the underside of the basket was called out of bounds.
However, another Reddit user disagrees with this interpretation of the rules, stating that the underside of the backboard is not out of bounds. They suggest that the ball is only out of bounds if it touches the top of the backboard and goes over or touches any supports or other apparatus. This interpretation is supported by Rule 7-1 (NFHS), which states that a ball is out of bounds when it touches the "'supports or back of the backboard' or when it 'passes over a rectangular backboard.'
According to the NBA's Rule No. 8 on Out-of-Bounds and Throw-In, a ball is considered out-of-bounds when it touches any object above the playing surface or passes directly behind the backboard in any direction. This rule also specifies that the ball is considered out-of-bounds if it touches the supports or back of the backboard. Therefore, it can be inferred that if the ball touches the underside of the backboard, it would be considered out-of-bounds according to this rule.
It's important to note that the interpretation of the rules may vary depending on the specific league or tournament, and it is always advisable to refer to the official rules and regulations of the organizing body for definitive answers.
In summary, while there may be some differing opinions among players and coaches, the official rules of the NBA and other sources suggest that if the ball touches the underside of the backboard, it would be considered out-of-bounds.
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The ball passing over the backboard
The backboard plays a crucial role in basketball, and understanding the rules around it is essential for players and officials alike. When it comes to the ball passing over the backboard, several rules and interpretations come into play.
Firstly, it's important to note that the rules regarding the backboard may vary slightly between different basketball organizations and leagues, such as the NBA, WNBA, NCAA, and FIBA. However, there are some consistent themes across these organizations.
One of the fundamental rules regarding the ball passing over the backboard is that it results in a violation or an out-of-bounds call. Rule 8, which is referenced in several sources, states that the ball is considered out-of-bounds if it passes directly behind the backboard. This rule applies regardless of whether the ball is in motion during a pass or after a rebound. The ball is deemed out-of-bounds when it passes over a rectangular backboard or touches the supports or back of the backboard.
It's worth noting that there is a common misconception about the ball touching the top of the backboard. In most cases, simply touching the top of the backboard does not result in an out-of-bounds call. For the ball to be considered out-of-bounds, it typically needs to go over the backboard or touch any supports, apparatus, or the back of the backboard. This clarification is essential for players and coaches to understand, as it can significantly impact the flow of the game.
In addition to the rules regarding out-of-bounds, there are also specific penalties associated with the backboard. If a player attempts to score by using the backboard to lift, hold, or raise themselves, it results in a penalty, and the ball is awarded to the opposing team. Similarly, if a player's pass touches the backboard, it can result in a loss of ball and possession going to the other team. These rules emphasize the importance of skill and fair play without relying on the backboard for assistance.
Lastly, it's worth mentioning that the backboard plays a strategic role in the game. While the rules provide a framework, players can utilize the backboard to their advantage within the boundaries of the rules. For example, a player can use the backboard to angle a shot or pass, adding precision and unpredictability to their gameplay. Understanding the rules and the nuances of the backboard allows players to incorporate it into their offensive and defensive strategies effectively.
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The ball touching the backboard supports
There is some discrepancy regarding the rules of what constitutes a ball being out of bounds when it comes to the backboard. While some sources state that the ball is out of bounds if it touches the backboard supports, others claim that the ball is only out of bounds if it passes over the backboard or touches any supports or apparatus behind it. This confusion may be due to the difference between the rules of different leagues or organizations.
According to Rule 7-1 (NFHS), a ball is out of bounds when it touches the "supports or back of the backboard" or when it "passes over a rectangular backboard." This rule seems to be specific to US high schools. It is important to note that the rules do not identify the supports as being part of the backboard, which may explain why some people believe that the ball must touch the supports for it to be considered out of bounds.
In the NBA, Rule No. 8 states that the ball is out-of-bounds when it touches "...any object on, above or outside of a boundary or the supports or back of the backboard." This rule seems to imply that touching the supports or the back of the backboard would indeed make the ball out of bounds. However, it is not explicitly mentioned if the supports are considered part of the backboard or not.
To clarify, the "infinite plane" extending behind the backboard is considered out of bounds. This means that if a pass is made along the end line behind the backboard and it does not touch anything, it is not considered out of bounds. However, if the ball touches any supports or apparatus behind the backboard, it would be considered out of bounds.
In conclusion, it appears that the ball touching the backboard supports can result in an out-of-bounds call, but the specific rules may vary depending on the league or organization governing the game. It is always important to refer to the official rules and regulations of the specific league or tournament to determine the exact guidelines regarding out-of-bounds calls.
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The ball going out of bounds due to a player
In basketball, the ball is considered out-of-bounds when it touches a player who is out-of-bounds or any other person, the floor, or any object on, above, or outside of a boundary or the supports of the backboard. The ball is deemed out-of-bounds due to a player when the last player to touch it causes it to go out, provided it goes out due to touching something other than a player. If the ball goes out because it touches a player who is on or outside a boundary, that player is responsible for it going out.
For instance, if a player has their hand in contact with the ball and an opponent hits that hand, causing the ball to go out-of-bounds, the team whose player had their hand on the ball retains possession. Additionally, if the ball goes out-of-bounds and was last touched simultaneously by two opponents, regardless of their position, or if the officials are unsure about who last touched the ball, play is resumed with a jump ball between the two players involved in the nearest restraining circle.
It is important to note that a player should not be the last to touch the ball before it goes out-of-bounds, as this results in a penalty and the opposing team gains possession. Furthermore, a player who is dribbling the ball and steps on or outside a boundary line cannot return inbounds and continue their dribble. They are also not allowed to be the first player to touch the ball after re-establishing an inbounds position.
In the context of throw-ins, if a throw-in goes out-of-bounds without being touched by a player, the ball is returned to the original throw-in spot. During the last two minutes of the fourth period and any overtime period, an exception is made, and the ball can be passed anywhere on the court. However, if the offensive player fails to control the ball and it goes into the backcourt, their team cannot be the first to touch it.
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Throw-in rules
A throw-in starts when the ball is given to the player entitled to the throw-in. The player must release the ball within 5 seconds from the time they receive the ball and control it. Until the passed ball has crossed the plane of the boundary, no player shall have any part of their body over the boundary line. Teammates shall not occupy positions parallel or adjacent to the baseline if an opponent desires one of those positions. The defensive player shall have the right to be between their player and the basket.
If a throw-in goes out of bounds and is not touched by a player in the game, the ball is returned to the original throw-in spot. A throw-in that touches the floor, or any object on or outside the boundary line, or touches anything above the playing surface is a violation. The ball must be thrown directly inbounds.
After a score, field goal or free throw, any player of the team not credited with the score shall put the ball into play from any point out-of-bounds at the endline of the court where the point(s) were scored. They may pass the ball to a teammate behind the endline, however, the five-second throw-in rule applies. This rule also applies to the player of the team with possession at the start of the second, third and fourth periods. After a free throw violation by the shooter or their teammate, the throw-in is made from out-of-bounds on either side of the free throw line extended. Any ball out-of-bounds in a team’s frontcourt or at the midcourt line cannot be passed into the backcourt. On all backcourt and midcourt violations, the ball shall be awarded to the opposing team at the midcourt line, and must be passed into the frontcourt.
If the ball is interfered with by an opponent seated on the bench or standing on the sideline, it shall be awarded to the offended team out-of-bounds nearest the spot of the violation.
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Frequently asked questions
The backboard itself is not out of bounds. However, if the ball touches the supports or back of the backboard, or passes over or directly behind it, it is considered out of bounds.
In addition to the above, the ball is out of bounds when it touches a player who is out of bounds, any other person, the floor, or any object on, above, or outside of a boundary.
If a player throws the ball out of bounds, it is given to the offended team out of bounds nearest the spot of the violation.
After a score, field goal, or free throw, a player from the team not credited with the score puts the ball into play from any point out-of-bounds at the endline of the court where the point(s) were scored.
The player must release the ball within 5 seconds from the time he receives and controls it.







































