What is the birth date of this American former professional basketball plater who was acquired by the Portland Trail Blazers during the off season of the 2001-02 Portland Trail Blazers season?
2001–02 Portland Trail Blazers season:  During the offseason, head coach Mike Dunleavy was fired after four years and two trips to the Western Conference finals, and was replaced with Maurice Cheeks, as the Blazers acquired Derek Anderson and Steve Kerr from the San Antonio Spurs, and signed free agent Ruben Patterson.
i don't know