Bulpett: As playoffs loom, Celtics keep focus in-house

Credit: Stuart CahillIt was nearly two hours before last night’s game against Brooklyn, the outcome of which was of no matter to the Celtics.

Oh, they did set out a game plan against the Nets, one that would not be executed by most all of what constitutes their regulars nowadays. But the deeper scouting dives were being taken into Milwaukee, Miami and Washington — the possible first-round opponents.

“They’ve already started all that stuff,” said Brad Stevens of his assistants, “obviously already looking at all the potential matchups. Different guys have different assignments. So we’ll see who we play. You’ll all know when we know, so then we’ll start preparing for one specifically.”

But even…