A stiff back, exacerbated by a 7-hour plane delay, led Shawne Williams to end his workout Thursday. Ed Stefanski called him skilled but "somewhat raw because of inexperience". Bobby Jones, Washington's defensive specialist, comes in Monday. Rod Thorn indicated the Nets would be focused more on the draft this year because the free agent crop is so limited. Meanwhile, the Post's Fred Kerber reports the Nets are "likely" to exercise Cliff Robinson's option "because it can be used in a trade".