New York Knicks rookie Danilo Gallinari has a sore lower back and is listed as doubtful for the remainder of the Las Vegas summer league. The forward from Italy, the No. 6 overall pick, was hurt during the Knicks' opener, a 97-94 victory over Cleveland on Monday. He rebounded from a scoreless first half to finish with 14 points, shooting 5-for-7 after halftime.