Whether Marbury fits in is under investigation. According to a source aware of the situation, Knick coach Mike D'Antoni will meet with each player individually during the Las Vegas summer league that begins this weekend, in an attempt to figure it out.
All veterans, including Marbury, are expected to attend a voluntary mini-camp that begins Friday.
Marbury isn't a favorite in the locker room - some players think he's too much of a self-promoter.
Walsh also is trying to make another trade and possibly add another backcourt shooter before a decision on Marbury is made.
Even with Duhon, Walsh said, "If you looked at our depth chart, you'd say we need more guards."
Walsh said D'Antoni often uses three-guard alignments.
The Knicks had half a season to show Marbury was an albatross after he underwent season-ending ankle surgery in January. But instead, they stumbled to a 14-33 finish.
"I don't make any prejudgment on [Marbury]," Walsh said. "I've been here three months and he wasn't playing. All I know is the guy's got a lot of talent, he's a very good player. And that's it."