Help is on the way, although it is still more than a week away. Carlos Quentin is scheduled to start an extended rehab assignment with Triple-A Tucson Tuesday. The left fielder, who had arthroscopic surgery on his right knee March 19 to repair the meniscus and remove floating particles, will spend at least a week with Tucson. "The medical staff and Carlos say he is ready," Padres manager Bud Black said Monday afternoon at Petco Park after watching Quentin put his knee through a series of tests.