Young, who has been San Diego's most consistent pitcher this season, entered the game with a 9-3 record and a Major League-leading 1.85 ERA.
The 6-foot-10 right-hander worked two seemingly easy innings before leaving the game, allowing no hits and no walks with one strikeout.
He had been staked to an early lead Tuesday on a three-run home run by Mike Cameron in the first inning.
Young hasn't lost a game since May 12 and has lowered his ERA from 4.33 on April 26 to 1.85. He won a spot on the National League All-Star team earlier in July by winning Major League Baseball's Final Vote online balloting.
Young was replaced on the mound by left-hander Justin Hampson, who was recalled on Monday from Triple-A Portland.
Corey Brock is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.