The San Antonio Spurs pulled off the big trade on Tuesday opening up a bunch of roster positions that need to be filled.  The next step in this here offseason is the draft and it could be interesting for us Spurs fans. Where is the roster right now? Thin.  The roster is thin.  We really only have 8 guys under contract (Marcus Williams is on a non-guaranteed deal and I think the Summer League will be the determining factor on him). Tim Duncan - C Tony Parker - PG ...