He launched another salvo Sunday, blaming two sloppy losses to the Lakers and Raptors on a shortage of practice time.
"This is what I talk about [with] practice and how important practice is," Garnett told reporters after the team's 95-91 win over the Bulls. "Throw the season together, without practice time, and this is the stuff you see. I'm not going to back off that.
"You want a quality product? You have to give time for that quality product to be quality."
The Celtics got a much-needed practice Tuesday on their second straight day without a game, but such lulls are rare this season. After the All-Star break, the Celtcs have consecutive days off just three times the rest of the season.