So what's taking so long? Green is waiting for his friend and teammate with the Toronto Raptors, Kawhi Leonard, to decide where he'd be going first before deciding.
But that may not be the case for much longer, his friend and podcast co-host says.
"I'm tweeting about the Mavericks a lot because Danny is thinking about the Mavericks a lot," Harrison Sanford said today on the Ben & Skin Show on 105.3 The Fan. "As time has gone on here, he's really valued what the Mavericks have put in front of him.
"I think at the beginning of free agency, he was going to wait on Kawhi, and I think there's part of him that still kind of wants to. But I think, seeing what he has in front of him ... a tantalizing offer ... He just turned 32 last week so there's some assurances that he wants as he continues his career.
"In his Twitter bio, he gives respect to those who give respect to him. And by what the Mavericks are putting in front of him, it's a very respectable offer and very respectable responsibilities (come with it)."
"That's correct. Danny's gotten to the point where he's seriously considering passing on waiting for Kawhi to make a decision. He has to take care of himself. He plays in the NBA and he's very cognizant as all players are of what's out there on the market for him and for players like him. I know for a fact that tonight he's meeting with his agent out in Winnipeg (where he's doing basketball camps) and there will be a serious huddle as regards to making a decision and weighing that against waiting on Kawhi."