4-Out 1-In Motion Offense: The Complete Guide
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If you have one good post player and four players who can handle and shoot a little, the 4-out 1-in motion offense is probably the best structure you can run. It keeps the floor spread like a 5-out, but it gives you an inside hub — a player who can post up, set ball screens, and screen for cutters. When coaches say they run "4-out motion," this is almost always what they mean.
Watch first: the Princeton Chin set is a 4-out 1-in alignment, one post at the elbow and four players out. Every read in it applies here. Full notes on the Chin set video page.
What Is the 4-Out 1-In Motion Offense?
The name describes the alignment: four players spaced on the perimeter and one player in the post (the "1-in"). The four perimeter players run motion principles — pass and cut, dribble-at, screen away — while the post operates inside as a constant threat and a screening hub. It is a read-based motion offense, so the players react to the defense rather than running a scripted play.
Alignment and Spacing
Set the four perimeter players in two corners and two slots (or two wings and two slots), and place the post on a block or at an elbow. The spacing rule is the same as every motion offense: fifteen to eighteen feet apart. The key adjustment with a post on the floor is that the perimeter players must respect the post's space — nobody drives directly into the post's defender or the help is free.
The Post: High vs. Low
Where your post plays changes the whole feel of the offense:
- Low post. The post sits on the block for direct post-ups, duck-ins when the defense fronts, and offensive rebounding. Best for a strong, back-to-the-basket scorer.
- High post. The post plays at the elbow or free-throw line, opening the entire lane for backdoor cuts and drives, and becoming a passing hub for high-low feeds and dribble handoffs. Best for a skilled, passing big.
The Reads
Post Actions That Make It Hum
The post is not just a target — it is a screener and a connector. The best 4-out 1-in teams use the post to:
- Duck in across the lane when the defense turns its head, sealing for a quick interior catch.
- Set ball screens for the point, turning the motion into a pick-and-roll on demand. If you want to go deeper, see the pick and roll offense breakdown.
- Screen for cutters — a back screen for a slot drive, or a flare screen for a shooter.
- Flash high to receive and feed cutters going backdoor, the same high-post action that anchors the Princeton offense.
Three Ways Good Coaches Use the One Post
The alignment is the same. What the post does is what separates the systems built on it. Pick one job for your post and teach it until it is automatic before you borrow from the others.
The post as the screener. In the blocker-mover offense, the single post is the primary blocker and the four perimeter players are movers who cut and relocate. The post sets down screens and back screens all possession. Simple roles, less decision fatigue, a good fit for young teams that cannot yet handle free reads.
The post out of the way. In the dribble drive motion, the post lives on the weak side and the middle of the floor stays empty on purpose. The four perimeter players attack the rim off the dribble and hunt layups, fouls, and kick-out threes. The post's job is to stay out of the driver's lane until the drive commits help, then finish.
The post as the passer. In the Princeton system the post plays at the elbow, catches, and reads cutters. The dribble-at backdoor and the give and go both run through him. This is the version that produces the most layups on backdoor cuts, and the one this site teaches. Start with the Chin set.
The Two-Passes Rule
If you teach nothing else about motion, teach this: two passes before a shot. It is one of the seven keys most motion coaches agree on, alongside constant movement, reading the defense on every touch, screening away after a pass, cutting hard through the key, spacing to the gaps, and making the extra pass. Two passes forces the ball to move, which forces the defense to move, which is what creates the drive or the backdoor in the first place.
When to Move Up or Down an Alignment
Most youth and high school programs treat the alignments as a ladder. Start in 3-out 2-in when you have bigs but not shooters. Move to 4-out 1-in as the perimeter reads improve and one post separates from the pack. Move to 5-out only when all five can make the defense respect their catch. Move back down a rung any time a lineup change breaks that rule. The motion offense hub compares all four side by side.
Why It Works
The 4-out 1-in motion offense gives you the best of both worlds: the spacing and driving lanes of a spread offense, plus an interior hub that defenses have to account for. It is flexible enough to feature a dominant post or simply use an average post as a screener and connector. And like all motion, it teaches reads, not memorized plays.
One good post changes everything. In 4-out 1-in you do not need that post to score twenty — you need them to seal, screen, and pass. Do that, and the four players around them get layups and open threes all night.
— Coach Lee DeForest
4-Out 1-In vs. 5-Out
The choice comes down to your roster. With no true center, the 5-out motion offense empties the paint and maximizes driving lanes. With one strong interior player, 4-out 1-in keeps that spacing but adds a post hub. If you have two bigs, step up to the 3-out 2-in motion offense. The principles — spacing, cutting, reading the defense — never change; only the alignment does.
Frequently Asked Questions
What is the 4-out 1-in motion offense?
The 4-out 1-in motion offense spaces four players around the perimeter and one player in the post. The perimeter runs pass-and-cut and dribble-at reads while the post serves as a hub for duck-ins, ball screens, post-ups, and screening actions for cutters.
Is the 4-out motion offense the same as 4-out 1-in?
In practice, yes. When coaches say 4-out motion offense they almost always mean four players on the perimeter and one in the post — the 1-in. A true four-out with a completely empty post is rare; the post player is what makes the offense a 4-out 1-in.
When should I use 4-out 1-in instead of 5-out?
Use 4-out 1-in when you have one strong post player you want to feature inside while keeping good perimeter spacing. Use 5-out when you have no true center and want to maximize driving lanes with an open paint.
Where does the post player line up in 4-out 1-in?
The post can play high (at the elbow or free-throw line) or low (on the block). A high post opens the lane for backdoor cuts and dribble penetration; a low post is better for direct post-ups and offensive rebounding. Many teams let the post flash between the two.
What does the post do in a 4-out 1-in motion offense?
It depends on the system. In blocker-mover the post screens all possession. In dribble drive the post stays on the weak side out of the driver's lane. In the Princeton system the post plays at the elbow as a passer and the cutters read him.
What is the first rule to teach in 4-out 1-in?
Spacing, then two passes before a shot. The second rule keeps the ball moving, and a moving ball is what creates the drive or the backdoor.
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