The TD Garden crowd let the Celtics hear it Friday night during their 114-97 loss to the Kings.
The fans watched an uninspired performance from the defending champions against a significant underdog, so they booed.
To make matters worse, the Kings were without star guard De’Aaron Fox, and Celtics coach Joe Mazzulla still wound up pulling his starters before the buzzer sounded in the fourth quarter because the game was out of hand. The Celtics were not at their best, and effort issues only compounded the problem.
Celtics center Kristaps Porzingis said the boos were appropriate.