For months, the dramatic decline of Kristaps Porzingis during the Boston Celtics’ playoff run was an enigma. The big man looked a shadow of himself, struggling with exhaustion and shortness of breath that defied explanation. Now, in a revealing piece by The Athletic, the mystery has been solved. Porzingis was fighting a hidden battle against POTS (Postural Orthostatic Tachycardia Syndrome), a serious autonomic condition that he says hit him “like a truck” and derailed his postseason.

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The Diagnosis: What is POTS?
POTS is an autonomic nervous system disorder that causes a dramatic, debilitating reaction when moving from lying down to standing up. As described in The Athletic:
Symptoms: A sudden, excessive increase in heart rate, dizziness, and severe fatigue.
The Cause: In simple terms, gravity causes blood to pool in the lower body upon standing. For most people, the body automatically compensates. For someone with POTS, this system fails, leading to a lack of blood flow to the brain and the ensuing symptoms.
This diagnosis perfectly explains Porzingis’ ordeal. “The breathing wasn’t good… my engine wasn’t running the way I wanted,” he recounted. It wasn’t a lack of toughness; it was a physiological condition sapping his ability to perform at an elite level.
The Celtics’ Conundrum: A Business Decision Amid Medical Uncertainty
The revelation of Porzingis’ condition adds a layer of complexity to the Celtics’ decision to trade him to the Atlanta Hawks this past summer. While some may criticize the team for trading him when his value was at its lowest, the financial reality made the move almost inevitable.
The Celtics were “hard-pressed by the second apron” of the NBA’s luxury tax. Shedding Porzingis’ significant salary was a “priority” for the front office, a cold but necessary business decision driven by the league’s punitive financial rules, regardless of his unknown health status at the time.
A Bittersweet Resolution
For Porzingis, the diagnosis is likely a relief after months of uncertainty. Knowing the enemy is the first step toward managing it. He can now work with medical specialists to address POTS directly.
For the Celtics and their fans, it’s a bittersweet answer. It provides closure and vindicates Porzingis, explaining why a key player suddenly diminished. Yet, it also underscores the “what if” of last season’s championship pursuit and the harsh, unemotional nature of NBA roster building.
The story of Kristaps Porzingis’ final months in Boston is one of hidden suffering and the collision of health and business. The diagnosis of POTS brings long-awaited clarity to a confusing and frustrating chapter. It reveals the immense challenge Porzingis faced simply to step on the court, transforming the narrative from one of unexplained underperformance to one of resilience. As he begins his journey with the Atlanta Hawks, he does so with a clear path forward for his health, while the Celtics are left to ponder a championship run that was perhaps one healthy big man short.