Scott Layden's plan to revamp the Knicks roster could include Celtics All-Star power forward Antoine Walker.

The Knicks and Celtics have had serious discussions in recent days concerning a deal for Walker, according to a league source.

A potential deal could include Latrell Sprewell, whose contract matches Walker's. Or Boston could be looking to cut payroll by adding several lower-salaried players, including Kurt Thomas. A third team may have to be involved in order to complete the deal.

Walker, who will turn 27 in August, has averaged 20.8 points and 8.7 rebounds in seven NBA seasons. But the 6-9 forward was severely outplayed by Kenyon Martin in the Nets' four-game second-round sweep of Boston. Walker averaged just 14 points and shot 34% in the series.

Since the Celtics' playoff exit, Walker has been the subject of several trade rumors, including one to his hometown Chicago Bulls. While Walker is a talented albeit moody player, many teams have been turned off by his contract, which calls for him to make $28 million over the next two seasons.

Sprewell is also scheduled to earn $28 million over the next two seasons, although his contract includes an opt out clause for July 2004. The Knicks have been looking to move Sprewell since last summer but have found few willing partners.