"It's coming along pretty good," Cain said on Friday. "I've been running the last few days and feeling pretty good right now. Maybe leave tomorrow or Sunday to head to Arkansas and get some rehab games in. I'll be a Natural for a little bit."
That's the Double-A Northwest Arkansas Naturals, currently playing in Little Rock and due back home in Springdale, Ark., on Monday.
"I wouldn't say a hundred percent, but I'm very close to it," Cain said. "Hopefully it'll continue to feel good and I can get back up here as soon as possible."
Cain played just five games before being injured running into the center field wall at Oakland while making a difficult catch. He was batting .133 (2-for-15) after being one of the Majors' top hitters in Spring Training.
"I took about a week and a half off, so I've definitely got to back into it and get the swing right again," he said.
Cain ran through and passed several tests during Thursday's off-day. He'll be eligible to come off the disabled list next Thursday.