Nationals director of player development Mark Scialabba said Sunday that he expects Kieboom (hamstring) to miss "a few weeks," Jorge Castillo of The Washington Post reports.
Kieboom has been sidelined since May 12 with this right hamstring injury. Scialabba was reluctant to offer up a recovery timetable for the 19-year-old shortstop, but it appears safe to conclude that Kieboom won't be rushed back to action, given his long-term value to the organization. The 28th overall selection in the 2016 first-year player draft, Kieboom was off to a hot start with Hagerstown, batting .333 with 16 extra-base hits in 111 at-bats.