Mitchell Robinson agrees with Boston, leaving the Knicks for a rival with a free agent deal

Mitchell Robinson is no longer a New York Knick. According to Yahoo Sports, the center has left the Knicks to join the Boston Celtics on a free agent contract, in a move framed as Boston compensating Robinson with a raise New York could not match.

The Knicks and Celtics have been preparing for each other in different ways for years, but Robinson’s departure adds a new layer to that rivalry because he was not simply a rotational big. The Yahoo Sports report describes Robinson as a specific target of Boston’s opponent management last season, noting that the Celtics leaned into the “hack-a-Mitch” approach to limit his impact by pushing him to the foul line.

Robinson, for his part, has repeatedly challenged the premise behind that strategy. The report says he brushed off the idea that the repeated fouling was a sign opponents feared his scoring, and instead argued it showed respect, including an assertion that teams viewed him as a threat. The story also points to Robinson making similar comments in other settings, citing the NBA Finals when the San Antonio Spurs employed the same approach and Robinson responded in comparable fashion.

Boston’s angle, as described by the report, was practical. If Robinson’s presence on the court forces opponents into a foul-rate calculus, the Celtics can use that dynamic to control possessions, even if the strategy invites bursts of momentum when the other team converts at the line. In other words, the “hack-a-Mitch” label may sound like a single tactical trick, but it is also a statement about how valuable a rim-runner and defensive rebounder can be in late-game structure.

From Boston’s perspective, the timing matters. A free agent addition of Robinson gives the Celtics another physical center option to pair with their existing defensive identity and to keep rim protection organized when matchups get uncomfortable. For New York, losing a player who drew such deliberate late-season game planning underscores how difficult it can be for a franchise to retain specific roles when the market offers a path to a new valuation.

The Knicks, meanwhile, will now need to adjust their frontcourt rotation around the gap Robinson leaves. Even if Boston’s decision centered on Robinson’s overall value rather than any single wrinkle of free throws, the fact that the Celtics and Robinson spent last season intersecting through that strategy becomes part of the narrative of the move: Boston planned around him, and now gets to deploy him.

What to watch next is how Boston integrates Robinson into its defensive and personnel patterns. The Celtics have built much of their recent identity around communication, switching and controlling the middle of the floor, and Robinson’s foul-line profile and rebound production will determine how opponents respond. For New York, the priority will be replacing not only size and defense, but also the kind of opponent-specific leverage that Robinson’s presence created at the end of games.