Young, once considered a cornerstone of the club, was demoted to Triple-A Reno on Aug. 10 after hitting .194 with 95 strikeouts in 315 at-bats. At Reno, Young hit .370 with three homers, five doubles and a triple in 13 games, earning a quick return to the major leagues.
Manager A.J. Hinch put Young in the lineup in center field against Houston on Saturday night.
"He didn't just go down and get a few hits; he pretty much dominated while he was down there, so we were anxious to get him back up here," Hinch said before the game.
Young's return creates a crowded outfield for the Diamondbacks heading into the last month of a lost season.
Eric Byrnes is expected to return soon from a broken left hand that put him on the disabled list on June 26. Byrnes is hitting .216 in the second year of a three-year, $30 million contract.
Alex Romero, who is hitting .270 in 49 games, has made a favorable impression but may see few at-bats down the stretch.
It appears unlikely that Conor Jackson, the opening day left fielder, will return from a bout of Valley fever that has sidelined him since May 11.
"The competition's going to be thick, but in an ideal world, [Gerardo] Parra, Young, [Justin] Upton would be our lineup," Hinch said.
An MRI revealed inflammation in Snyder's lower back. A strain in the same area sent the 28-year-old Snyder to the DL from June 23-July 28.
Hinch said Snyder's return this season was uncertain, and the club decided to put him on the DL even though rosters expand on Tuesday.
"He's got a chance to return still, but we're not sure for the next couple of weeks," Hinch said.