The veteran left-hander is going to be rehabbing from Tommy John surgery at the Phillies' Bright House Field in Clearwater, Fla. Philadelphia has not signed Moyer to a contract, so he remains a free agent, but he asked the Phils if he could use their facilities.
Moyer pitched with the Phillies from 2006-10, going 56-40 with a 4.55 ERA.
"We're providing him our space in Clearwater and our expertise," general manager Ruben Amaro Jr. said.
Moyer went 9-9 with a 4.84 ERA in 19 starts in 2010 before he injured his left elbow in July. He tried to rehab the injury without surgery, but it did not go as planned. He had Tommy John ligament replacement surgery in December.
Moyer is 267-204 with a 4.24 ERA in his 24-year career.
Todd Zolecki is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.