New York Newsday (Alan Hahn) reports: It has been believed since Donnie Walsh took over the Knicks in April that Stephon Marbury’s tumultuous days as a Knick were numbered. Now the matter is days from being official, Newsday has learned. Several persons with knowledge of the situation have indicated that the Knicks are planning to part ways with Marbury by the end of the week. One caveat is the approval of Madison Square Garden chairman James Dolan, who must sign off on yet another multimillion-dollar payoff for his NBA team. Marbury is in the final year of his contract, which is to pay him $21.9 million. The Knicks will likely place Marbury on waivers and, once he clears, begin negotiating a buyout. Marbury will then be free to sign with another team; the Miami Heat have a desperate need at point guard.