martin wrote:you got the wrong "he". For any player to be available for playoff roster, said person has to be signed by today (with Mason getting cut for the roster spot).
No, that's not correct.
A player must be waived by March 1st to be eligible to sign with a new team and make the play-off roster.
If he appears on an NBA roster after March 1st, he is only eligible to be on THAT team's play-off roster.
Teams can sign free agents (including D-League players, and foreign players who were previously draft eligible) up until the last day of the season and still qualify for the postseason.
The Knicks could theoretically sign Leon Powe anytime before the end of the season, but in order to give Mason a shot at someone else's postseason roster, he must be released before midnight tonight.