Kerkering (hamstring) will make the second of back-to-back rehab appearances Wednesday at Triple-A Lehigh Valley, Todd Zolecki of MLB.com reports.
Kerkering is eligible for activation from the 15-day injured list April 6, and making back-to-back appearances points to him being ready to go on that date. He's been working his way back from a strained hamstring that knocked out most of his spring training.