No changes in NBA playoff format for nowNEW YORK — NBA owners held their first serious discussions about the playoff format, though Commissioner Adam Silver said Friday it was too soon to tell if there was interest in changing it.The playoffs will open Saturday without the Oklahoma City Thunder, who finished ninth in the Western Conference with a 45-37 record that would have made them the No. 6 seed in the East.Silver noted the races for the final spots in both the West and East, claimed by New Orleans and Brooklyn, went down to the final night of the regular season.