"It was good, very good," O'Day said. "I felt great. My command was a little off, maybe because I was so excited facing hitters."
O'Day can come off the 60-day disabled list on June 26, but that might be pushing it. He is not close to being able to pitch in games and will continue to be limited to live batting practice for the time being.
"He's rusty," manager Ron Washington said. "He threw some good pitches, but there wasn't any consistency. This was a start. He left the mound feeling pretty good, but he's still got to build up stamina. But it was nice to see him on the mound."