Point guard Mike Conley (Memphis) already has been identified as the Dallas Mavericks' top target in free agency when the period opens next week.Thursday, SportsDay's Eddie Sefko added that Hassan Whiteside (Miami) will be a focus of the Mavericks in free agency as well, though the center position, he notes, is a much deeper one than point guard.Late Thursday, Ian Begley of ESPN.com (New York) reported that the Mavericks are expected to have interest 28-year-old forward Lance Thomas, who just completed his fifth NBA season.Thomas joined the Knicks from Oklahoma City during the 2014-15 season.