The Nets waived small forward Harold Ellis after yesterday's practice to clear a spot.
The Nets also waived forward Scott Padgett, who had one year, worth $1.8 million, remaining on his contract.
When he became too unhappy with that role, the Nets waived him Jan. 30.
Haley, who may have been activated so the Nets can waive him, was available only in case of emergency.
To make room on the roster, the Nets waived guard Doug Lee, who did not play in either of the first two games.
Four days later, the Nets waived Williams.
In October 2003, the Nets bought out the remainder of his contract and subsequently waived him.
The Nets waived Graham on December 22, 2011, following the lockout.
If Seikaly were to perform below expectations, the Nets could waive him and not be liable for the remainder of the contract.
But the Nets do not have to guarantee his contract until Jan. 10, 2002, and could waive him at any time.