If the Boston Celtics are actually tanking, they are doing a really bad job of it. The Celtics played three very different kinds of basketball games over the previous five days – I was at two of them – that showed a lot about the way this team is operating. And giving away wins for ping-pong balls isn’t part of the plan. On Friday, Boston scored the first 14 points against Denver and led 39-15 after the first quarter. The Celtics nearly gave