Young allowed a home run, but retired the final eight batters he faced in a three-inning start for Triple-A Portland on Tuesday night. He threw 31 pitches (24 strikes) and was on a 50-55 pitch count.
"I like that he threw strikes," Black said.
Young, on the 60-day disabled list since April with a strained right shoulder, will be limited to four innings or 45-60 pitches in his next Minor League rehab start, which could be for either Portland or Class A Lake Elsinore.
Black said that because the Minor League season will end before Young is ready for the Majors, the veteran right-hander could make an appearance in Arizona's Rookie-level instructional league.
As for whether Young, whose contract calls for an $8.5 million club option in 2011, could return in time for the postseason, Black tempered his enthusiasm.
"I think it's unfair to place any expectations on C.Y. moving forward," the manager said. "He's been out a long time, and he's done a lot of work on his shoulder."