By EDDIE SEFKO The Dallas Mavericks may not strike it rich in free agency, but they are becoming quite adept at adding quality role players. After scoring with Brandon Bass and James Singleton in recent summers, the Mavericks started this years free-agen 506 2009-06-23T05:26:16-04:00 Mavs bid for guard Ross 62764 --- [] 2009-07-02T00:09:00-04:00 567 Fort Worth Star-Telegram http://www.star-telegram.com/287/index.xml 3 29 2009-11-22T07:46:49-05:00 http://www.star-telegram.com/287/story/1465674.html