Kerkering (forearm/illness) will begin a rehab assignment at Triple-A Lehigh Valley on Saturday.
Kerkering is officially on the 15-day IL with a right forearm strain, but his rehab assignment will build him back up after he missed most of the Grapefruit League schedule due to a bad case of the flu. As a reliever, the 22-year-old righty shouldn't take long to prepare for a return to Philadelphia's bullpen, so he could be able to come off the IL when eligible April 9.