Blowing a 3-1 lead is the kind of thing that doesn't get filed away quietly in this town. It festers. It becomes the lens every move gets viewed through for years. So when the Celtics coughed up their series against the Sixers, the radio takes were always going to come hot and personal, and Mut went straight to the top of the org chart.
You can argue the merits all day. Mazzulla is one of the youngest head coaches in the league, he inherited a loaded roster mid-controversy, and squandering a 3-1 with this group is the kind of resume line that sticks regardless of what comes after. Boston doesn't grade on a curve, and a series where you had three chances to close it out and couldn't is the exact scenario where talk radio sharpens the knives.
Hubbs, for his part, sounded like a guy who knew this conversation was coming and dreaded every minute of it. When even your colleagues are bracing for the rant, you know the take is going to be loud.
Whether Brad Stevens actually pulls the trigger is a different question — front offices generally don't let one series swing a coaching decision, especially when half the locker room was built around the current voice. But that's not really the point of a Mut segment. The point is that a 3-1 lead got blown, somebody has to wear it, and in Boston the head coach is always first in line.