Brett Brown was asked Monday about 76ers injured power forward Arnett Moultrie.

“I don’t even know Arnett Moultrie,” the Sixers coach jokingly responded. “He’s a ghost.”

Brown went to rave about the sidelined second-year player’s reduced body weight.

“He has bought in in a big way while not doing anything,” he said.

Moultrie is not expected to play until January after undergoing preseason surgery to prepare his left ankle. He suffered the injury during a workout.

“That’s a hard a role as you can give anybody is say ‘Don’t play. We are trying to rehab you,’ ” Brown said. “So a lot of times he’s not with the team.”

Yet, Brown said Moultrie has paid attention to his fitness, reduced his skinfold measurements and lost weight.

The coach is looking forward to getting the 6-foot-10 post player back on the court. He believes Moultrie has a bounce and energy that the team needs to extract on a regular basis.

“That was the knock on Arnett,” Brown said. “That he had all that. But would he be a day-to-day guy, a possession-for-possession guy?”