Rolen has been getting therapy and massages daily and received an injection on May 14 in an effort to reduce the inflammation.
"They did it under an ultrasound so they got it into the joint," Rolen said on Monday. "They're trying to calm it down so I can get back to baseball stuff."
Eligible for activation on Sunday, Rolen still did not know when he could resume baseball activity.
"We haven't even talked about it," he said.
Rookie Todd Frazier has started every game at third base since Rolen went on the DL.
"Even though we've played well, we still need Scotty," Reds manager Dusty Baker said.
While Frazier has mostly handled himself reasonably well at the position, Baker has recently gone to Wilson Valdez as a defensive replacement late in some games.
"We feel Valdez is a better defender with more experience," Baker said.
Regardless of who has been at third, not every throw has been pinpoint perfect the way it was with Rolen -- an eight-time Gold Glove Award winner.
"You get spoiled by that," Baker said. "It's not how it is in a lot of places."