Over the course of six hours on Monday, the Celtics held their 2025-26 media day at their Auerbach Center practice facility.

Thirteen players, two Celtics decision-makers and one world-renowned scientist held news conferences during the marathon event, which took place one day before Boston’s first training camp practice.

Here was one big takeaway from each of those 16 pressers:

The word of the day for Stevens was “unproven.” Boston’s president of basketball operations used it four times to describe his team’s roster, which lost half of its rotation this offseason while adding just one player with real NBA starting experience.

“And when I say unproven, I’m not buying into any narrative of what they have been,” Stevens said. “We look at what they can do. Can you take what they’re capabl

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