De La Rosa (elbow) made his first minor-league rehab appearance Monday with High-A Visalia, tossing a perfect inning and striking out a batter.
Diamondbacks manager Torey Lovullo said that De La Rosa, who has been rehabbing a sprained UCL in his right elbow, looked sharp during his inning and sported a mid-90s fastball, according to Nick Piecoro of The Arizona Republic. De La Rosa's next outing with Visalia will come Friday, and it's likely he'll require several more rehab appearances at multiple minor-league levels before the Diamondbacks consider bringing him onto the big-league roster. He could be ticketed for relief duty if he reemerges with the big club.