Recent coverage of Mitchell Robinson's hand injury put the Knicks in the familiar playoff spot: hoping a key big can suit up for the NBA Finals while everyone else starts asking the depth-chart question.

The quick answer is this: NBA teams replace injured playoff starters by redistributing jobs, not just minutes. The next player up may take the floor time, but he rarely brings the same screen angles, defensive matchup, rebounding presence, spacing effect, and closing-lineup trust. That is why one injury can make the whole rotation look different even before anyone takes a shot.

The replacement is really five replacements

A starter is not one thing. He is a bundle of small jobs.

For a big like Robinson, the conversation naturally starts near the rim. Who sets the first screen? Who occupies the dunker spot? Who gives the ball-handler a target when the defense steps up? Who lets perimeter defenders stay attached because the back line can survive contact?

Change that player and the floor does not politely keep the same shape. The first pass may be cleaner but the roll threat may be lighter. The spacing may open in one corner and shrink in the paint. A lineup that looked balanced with one big can become too small, too slow, or too easy to load up against once the job changes hands.

That is the part fans miss when they reduce playoff injuries to backup math. A coach is not only asking, "Who plays his minutes?" The better question is, "Which parts of his job can we keep, and which parts do we have to redesign?"

Matchups decide how much the injury costs

In the regular season, a team can survive some awkward fit because the schedule keeps moving. In the playoffs, the opponent gets to keep pressing the same soft spot.

If the injured starter was protecting the rim, opponents can test whether the replacement arrives on time. If he was a screener, they can switch more freely or crowd the ball earlier. If he was the player who let a coach close with a certain defensive shape, the last few minutes become a lineup puzzle instead of a simple substitution.

That is why playoff injury replacement often looks less like a promotion and more like a series of trades. Add shooting, lose size. Add mobility, lose rebounding. Add a steadier defender, lose vertical pressure. None of those trades is automatically fatal. All of them change what the team can ask its best players to do.

"Next man up" is a slogan, not a rotation plan

The phrase works emotionally. It is not a basketball answer.

A real playoff replacement plan has to decide where the offense starts, where the help defense comes from, and which lineup still makes sense when the game tightens. Sometimes the backup gets the first chance. Sometimes the team divides the role across several players. Sometimes the adjustment is less about the injured player's position and more about making the star's touches cleaner.

That is the useful way to read the Knicks example. Robinson's hand injury matters beyond his individual status because a playoff big changes the geometry around everyone else. The screens, catches, tags, contests, and late-game matchups all have to be accounted for.

So when a starter is injured in the playoffs, do not stop at the name replacing him. Watch the floor around the replacement. The answer is usually sitting in the space that opens, the help defender who has to take one more step, and the closing lineup a coach is still willing to trust.