Quackenbush appeared in one game, allowing two runs on 1 2/3 innings in the Padres' loss on Friday to the Nationals. The team needed a 13th pitcher because of two 12-inning games in the last week, and Quackenbush was summoned from Triple-A.
"It felt good to get my feet wet and get the first one [appearance] out of the way," Quackenbush said. "It was very exciting to be here."
Quackenbush flew Sunday to El Paso, where the Padres' Triple-A affiliate was to open its new ballpark on Monday.
Manager Bud Black said Quackenbush held his own in his first stint in the big leagues.
"The first time is a great experience," Black said. "He's passed a lot of the Minor League tests, which helped earn him a promotion. For him, it's continuing to pitch well in Triple-A. But there's a lot to like about him. He didn't scare off, and he threw strikes."
Corey Brock is a reporter for MLB.com. Keep track of @FollowThePadres on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.