Single-A Fort Wayne placed Kemp on the 60-day injured list April 22 with a left oblique injury, J.J. Cooper of Baseball America reports.
He suffered the injury right before he was set to make his first start of the year for the TinCaps. Kemp, 21, logged a 5.52 ERA, 1.52 WHIP and 64 strikeouts in 77.2 innings in the lower levels last year.