NBA arena upgrades: Nets building green roof, Celtics undergoing makeover and more Author:SI StaffPublish date:Jun 14, 2014NBA arena upgrades: Nets building green roof, Celtics undergoing makeover and moreRenderings of the planned new Sacramento arenaRenderings of a proposed Seattle arenaLatest NBA NewsSpurs Add Keldon Johnson to Injury Report vs. RocketsDeMar DeRozan showers Luka Doncic with praise after making triple-double look easyMagic Coach Jamahl Mosley 'Grateful' for Contract ExtensionJa Morant Reacts to Shocking StatInjury Report, Updated Odds (3/12): Oklahoma City Thunder vs. Indiana Pacers