De La Rosa, who has been on the disabled list since April 27 with an injured tendon band in the middle finger of his throwing hand, said his first rehab assignment went well on Wednesday and that his finger feels fine.
"It has no problems," said De La Rosa. "It feels much better. I feel nothing now."
De La Rosa was sharp in his first rehab appearance by tossing four innings and allowing one run on four hits on Wednesday and it certainly impressed Rockies manager Jim Tracy.
"It went very good," Tracy said. "We're just continuing to monitor any ramifications with the finger. That's the most important thing to us right now, but it feels great."