Dwight Howard is progressing "on schedule" four weeks after undergoing a bone marrow aspirate injection.

Howard has been out since Jan. 30 with the edema.

“He’s coming along,” Kevin McHale said. “I saw him on the treadmill which is a good sign, but I haven’t seen him on the floor. Until you see him on the floor, who knows.”

In addition to the weight room and pool workouts Howard began shortly after the Feb. 4 procedure, Howard has been running on a weight control treadmill.

Howard has not progressed to on-court "active" rehab that would include running, cutting and jumping.

“I’ve seen great players take two months off and come back and it takes them a while,” McHale said. “It’s just the pace of the game and the NBA grind. The game, the size, the speed, when you’re away from it and you’re out there, it just takes a little time. You need timing. You can’t get timing one-on-one at three-quarters speed for three weeks and then doing it at full spoeed for five days and jumping on the court. It just takes a lot of time.

“I’m hoping he comes back as soon as possible, but there’s no use in having him come back until he’s healthy and can play for us. I’m not sure how many games he will have under his belt at that time, but we have to make sure we make the best use of all those games. He’s got to get in the best rhythm he possibly can.”