The Sixers had said the holdup was Moultrie's noticeable lack of conditioning.
"It's not my ankle," Moultrie said. "It's not my conditioning. But at this point, I really don't care. I'm just sick of all the excuses. If it ain't one thing, it's another thing."
Sixers coach Brett Brown said Moultrie's exchange with the coaching staff didn't lead to his being assigned to the D-League.
"It was actually planed long before his comments," Brown said before Wednesday's game against the Boston Celtics at the Wells Fargo Center. "You see a young player that competitively wants to get out there on the court. In a twisted way, you applaud that."
"The bottom line for us is we asked our players to get into career-best fitness. And that is one of those not-negotiables."
Brown added they weren't going to play Moultrie until he was in top shape after missing an extended period of time.
Moultrie scored 17 points in a reserve role as the 87ers defeated the Maine Red Claws, 128-116, on Tuesday night.
He will remain with the Sevens until he meets the fitness standards the Sixers require.
Richardson as leader
Jason Richardson welcomes a huge responsibility.
On a Sixers team that's the youngest in the history of the NBA, the 13th-year veteran wants to be an example for teammates once he returns from a left-kneecap injury.
The 6-foot-6, 225-pound swingman's return is a month away at the earliest. Richardson hasn't played since suffering the injury last January. He was cleared to shoot light jumpers and foul shots on Monday.
"Player-coach," the 33-year-old responded with a chuckle when asked what his role will be.