The Boston Celtics announced Friday that the organization has waived Jermaine O'Neal and used the additional roster spot to acquire Sean Williams, the former Boston College Eagle who most recently played NBA hoops with the Dallas Mavericks.

Though Williams will be playoff eligible for the Celtics -- he was waived by Dallas prior to the eligibility deadline -- it's unlikely that the Celtics signed the athletic center thinking he will contribute much to the postseason run. More likely, the signing is similar to the Tony Gaffney acquisition two seasons ago, with the Celtics looking to see how Williams fits into the organization and assure that he takes a spot with the Celtics' entry in summer league.

Williams, still just 25, has career averages of 4.3 points, 3.4 rebounds and 1.2 blocks per game in 14.4 minutes. He's known as a premier shot-blocker who has not yet realized his full potential.

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