Kieboom went 4-for-5 with two home runs, a triple, a double and a walk for Double-A Harrisburg in its 15-3 win over Erie on Tuesday.
The 20-year-old scored runs each time he reached base in what was perhaps his finest game as a professional. Kieboom has delivered a solid, if unspectacular .269/.327/.425 batting line across 202 plate appearances in the Eastern League, but his age-to-level production in addition to Tuesday's massive performance exemplify the huge upside the shortstop possesses.