The inbound under your own basket: five seconds and a shrinking court

Why the situation is so tight

A team inbounding under its own basket has one player out of bounds, which means the players on the floor are outnumbered until the pass is completed. The available space is also compressed, since the region behind the backboard is unusable and the sideline limits movement in one direction. The passer has a limited number of seconds and a defender permitted to occupy the space directly in front of him.

Every one of these constraints favours the defence, which is why pressure on this inbound is such a common tactic when a team needs the ball. The offence is therefore not trying to create a scoring chance so much as trying to complete a pass and restore normal conditions.

Screens as the only reliable mechanism

A receiver who simply runs toward the ball is followed, since the defender has the same information and a shorter distance to cover. Screens set away from the ball are the mechanism that produces separation, because they force the defender to navigate an obstacle he can see but not avoid. Stacking several players together before the pass creates a situation in which the defenders cannot all follow their assignments cleanly.

The receiver who is freed is often the last one out of the stack, since the defence has committed to the earlier movements. These arrangements look rehearsed because they are, and improvising in this situation is how five seconds become a turnover.

The passer's constraints

The passer can move laterally along the baseline in some situations and not in others, which changes the angles available to him substantially. A defender positioned directly in front of him removes the direct pass and forces either a lob or a bounce pass, both of which travel more slowly. The lob is the most common answer and the most intercepted, because its slower flight gives a help defender time to reach it.

Passing to the strong side is safer and passing across the floor is more valuable, which is a trade the passer resolves in a fraction of a second. A timeout exists as an escape and it costs a resource that may be needed later, which is why it is used reluctantly.

How the defence attacks it

The most effective defensive approach is often not to attempt a steal but to deny every short option and force the pass to travel a long distance. A long pass takes longer to arrive, which gives a defender time to close and produces a contested reception rather than a clean one. Facing the ball rather than the assignment allows a defender to react to the pass, at the cost of losing track of movement behind him.

Switching every screen removes the mechanism the offence relies on, and it concedes mismatches that cannot be exploited in the time available. This is why the defence in these situations frequently switches when it would not do so anywhere else on the floor.

What happens after the pass

Completing the inbound does not resolve the situation, since the receiver is usually near the baseline with defenders converging on him. The next pass is therefore part of the same sequence, and offences rehearse it as such rather than treating the inbound as the objective. The player who inbounded the ball enters the floor as a free player, and his movement is often the fastest route out of the pressure.

A receiver who catches and holds the ball allows the defence to reset, which converts a solved problem back into an unsolved one. The whole sequence is therefore three passes rather than one, and sides that plan only the first find themselves trapped after it succeeds.