"I feel good," Volquez said. "My velocity is back."
• Spring Training: Schedule | Tickets | More info
Volquez gave up four runs over six innings in the Minor League start.
"My tempo was good," Volquez said. "I was a little off the first couple of innings. But I came back and the pitches were really good."
Volquez likely will make his last Spring Training start on Monday.
And after that, Opening Day?
"I don't know," Volquez said, smiling. "I think [manager Ned Yost] will tell you guys Saturday. It could be [Yordano] Ventura. Who knows? Maybe he's got a surprise."
Jeffrey Flanagan is a reporter for MLB.com. Follow him on Twitter at @FlannyMLB. This story was not subject to the approval of Major League Baseball or its clubs.