Marquis, who was 9-5 with a 4.05 ERA in 20 starts for the Padres this season, returned to San Diego this week to continue his rehabilitation work with the training staff.
After 1,921 Major League innings, Marquis isn't ready to call it a career just yet.
"I went over it with my wife and decided that I'm only 35 and I feel great," Marquis said. "I got it fixed and now we're planning some rehab and I'll work as hard as I normally do."
Marquis made his last appearance with the Padres on July 19, when he allowed six runs in 5 1/3 innings in a loss to the Cardinals. He started fast this season, winning nine games by June 15. But he was winless in his last six starts.
Marquis signed a one-year deal in December for $3 million. He's unsure of where he'll land or when he will be able to pitch again, though he's certain he will return.
"I got my full range of motion already," he said. "This week I start weight-bearing movements, doing all my shoulder and elbow stuff. I feel in midseason form without being able to throw."
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.