"It was the coolest experience that I've ever had in baseball," Peavy said, preparing for a morning workout with teammates he hadn't seen in nearly a month.
Peavy and the rest of Team USA were eliminated from the semifinals of the Classic on Sunday with a 9-4 loss to Japan. On Monday, Japan knocked off South Korea, 5-3, to win the event.
Peavy made two starts for Team USA in the World Baseball Classic. He was 0-1 with a 14.40 ERA, having allowed eight earned runs and five walks in five innings. He would have pitched in the title game had Team USA defeated Japan.
As it stood, though, Peavy found himself on the way back to Arizona on Monday for the final 10 days of Spring Training, which will resume for him on Friday when he faces the Oakland A's in Phoenix.
Peavy will also make a start on April 1 against the Chicago White Sox before the Padres break camp the following day. He will then start on Opening Day against the Dodgers at PETCO Park on April 6.
There was a thought that Peavy might throw on Tuesday against the Angels in Tempe, but manager Bud Black said he thought that having Peavy throw a long bullpen on Tuesday in Peoria would be time better spent.
Peavy appeared in one Cactus League game with the Padres before leaving to train with Team USA on March 2 in Florida. He tossed three scoreless innings in his only outing in the spring.
Peavy said Tuesday that his arm felt fine after the World Baseball Classic and that he did not anticipate any of the issues that bothered him after his participation in the first World Baseball Classic three years ago, when he struggled with shoulder tendinitis in the regular season.
As for the why Team USA didn't advance further in the World Baseball Classic, Peavy said he felt that timing had a lot to do with it.
"I wish it was played after the season," Peavy said. "American players are not up to speed yet ... some of these guys have 10 at-bats before they play."
Corey Brock is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.