Zone Baseline Out-of-Bounds (BLOB) Play: The “Slip” Action

Byhoopcoach
screen slip

Summary of the Play

This baseline out-of-bounds (BLOB) play is designed to exploit the positional responsibilities of a 2-3 zone defense. The action uses an initial screening appearance by a low-post player (a big) to freeze the baseline defenders. Instead of finalizing a solid block, the big “slips” or cuts early directly into an open gap in the middle of the zone. This rapid change of direction catches the defensive rotation out of position, resulting in an immediate high-percentage scoring opportunity right in front of the basket or in the paint.

Initial Set

The play utilizes a specialized baseline alignment, often originating from a flat stack or box look, designed to cluster defenders near the blocks.

  • The Inbounder: Typically a guard with strong passing vision, stationed out of bounds on the baseline.
  • The Screener (Big Man): Positioned on or near the strong-side low block, aligned to simulate a screen on the bottom-most defender of the zone.
  • The Perimeter Decoys: Positioned at the elbows or the opposite weak-side corner to stretch the top line of the zone and prevent help defenders from dropping into the lane.

Flow

1. The Deceptive Screen Set

The play begins with the big man making hard physical contact or moving decisively toward the baseline defender (X4 or X3) as if setting a permanent pin-down or seal screen. This intentional movement forces the zone defenders to brace for contact and shift their weight to fight over or around the anticipated pick.

2. The Slip Action

Before the defender can establish a legal guarding position against the screen, the big man instantly pivots and “slips” cleanly behind or through the defensive line. The big cuts directly into the immediate gap created between the lower-middle defender and the perimeter recovery line.

3. Delivery and Finish

The inbounder must read the slip the exact moment the big man changes direction. A crisp, direct chest or bounce pass is fed into the seam of the zone. Because the zone protects designated spaces rather than tracking individual players, the sudden vertical cut into the gap catches the center defender out of position, leading to an immediate catch-and-finish opportunity near the rim.

Coaching Points

  • Avoiding the Offensive Foul: The big man must not set a hard, static block and then drag the defender. The contact must be minimal and brief before the vertical release into the paint.
  • Inbounder Vision: The inbounder cannot look directly at the slipping big from the start of the play. Looking at the weak-side elbow or top of the key holds the upper zone defenders in place, keeping the lower passing lane open.
  • Floor Spacing: The remaining offensive players must maintain high and wide spacing. If the perimeter players cut toward the ball prematurely, they will bring their zone defenders into the lane, effectively collapsing the gap needed for the slipping big man.

Check out the animation of  Zone Baseline Slip Play

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