When it went down Celtics fans were up in arms — Boston traded Kendrick Perkins to Oklahoma City mainly for Jeff Green. Danny Ainge’s name suddenly came with a new adjective for Boston fans and it’s one we can’t repeat here.

Since then Boston has defended the trade and as Perkins’ production has slipped some of the anger dissipated.

Doc Rivers now admits it was a mistake.

Speaking to WEEI at a charity event in Boston this week Rivers said he thought it was a mistake because it exposed Kevin Garnett more and hurt him.