Luzardo (elbow) threw a successful bullpen session Thursday, Christina De Nicola of MLB.com reports.
Luzardo will make a rehab start sometime during the Marlins' upcoming road trip. The left-hander is eligible for activation from the 15-day injured list on May 10, and he could be a realistic candidate to start against the Phillies that day, if all goes well in his throwing program. Luzardo has been working his way back from a mild left flexor strain.