Donnie Basketball looks to go out with home run

The Knicks need an infusion of backcourt talent and size for a roster paper-thin after the Big Apple 3 of Amar’e Stoudemire, Anthony and Chauncey Billups.

“We’re trying to get a chemistry guy,” one person familiar with the draft strategy said.

The Knicks are concerned about aging point guard Billups and don’t feel Landry Fields is a starting shooting guard on a playoff power.

According to a source, if the right player isn’t there, the Knicks have considered trading the 17th pick for a veteran guard or center. Cleveland is heavily shopping point guard Ramon Sessions, whom the Knicks pursed as a free agent three years ago.

Walsh definitely will be active in his last stand. He has designs on buying either an extra late first-rounder or second-round pick, or both — with permission to throw around Dolan’s cash. The Knicks don’t have any second-rounders, giving up two of them in the Anthony haul.

The one player Walsh prays falls to them is 6-foot-7 Washington State shooting guard Klay Thompson, who outperformed Jimmer Fredette in their June 2 Westchester workout. Thompson reminds Walsh of Miller and would be a coup at 17, but league sources think Thompson could be scooped up by Golden State at 11.

Though not a need position, forward Chris Singleton of Florida State is another prospect the Knicks hope falls to 17, as they believe he can improve their defense at the 3 and 4.