Stephon Marbury Says Knicks Can Win Finals With Current Roster

TALKIN' BALL TMZSports.com

Ex-NBA star Stephon Marbury believes his New York Knicks are in a position to win a championship right now ... but tells TMZ Sports he wouldn't mind adding a few more key players along the way.

We caught up with Starbury out in NYC this week ... and had to ask about all the speculation surrounding his former team's interest in acquiring two-time MVP Giannis Antetokounmpo.

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While Marbury didn't really weigh in on Giannis specifically, he did say he'd hold the door open for any major talent ... as long as they mesh with the other guys on the current roster.

"I think we can win a championship with our team, but I do think that adding pieces is always something that…