Young was fantastic in a spot start Friday night, throwing five no-hit innings against the powerful Detroit Tigers, while striking out nine.
But after four days of rest, Young will return to his previous role in long relief.
"We'll slot him right back in the bullpen," Yost said.
Yost wouldn't speculate on whether or not he would turn to Young if Vargas or Guthrie continue to struggle over the next month.
"The next month or two is a long ways away," Yost said. "A lot can happen in a month or two. If we need a spot start or if someone needs to miss a turn or two, he's perfect for that.
"I've got five starters. I'm not going to talk about the production of our four and five guys when they've had three starts. These guys are veteran guys -- they'll get it together. I'm not going down that road. Our guys are going to be fine."