Lilly, who made his first rehab appearance Sunday with two scoreless innings for Class A Rancho Cucamonga, sounded only lukewarm about his progress on Tuesday.
"I'm feeling OK. A little sore," said Lilly, tentatively scheduled to make another rehab start Friday. "We'll see how it goes the next few days.
"I don't feel as good as I did at the beginning of Spring Training. My pitches are not where I like. Part of that is just missing so much time. I'm a bit of a feel pitcher, and I kind of need to be able to add and subtract and move the ball around to be effective."
Lilly was 5-1 with a 3.14 ERA when he went on the disabled list on May 24.