Kuo is on the disabled list with an anxiety disorder, and hasn't pitched since May 9. He has pitched in nine games this season, throwing 4 2/3 innings and allowing six earned runs for an ERA of 11.57.
In Don Mattingly's pregame meeting with the media Sunday, he said Kuo threw about 50 pitches earlier in the week before an off-day. Kuo is planning on doing the same thing again before taking any further steps, Mattingly said.
"The fact that he's out throwing again is encouraging to us," Mattingly said. "We're at a point where you got to let us know when you're ready. Take the next step. He'll be able to let us know that. Putting pressure on him isn't going to do him any good."