At 6-foot-2, 190 pounds, Kieboom has a good, athletic frame with room to add strength as he physically matures. He has a quick, loose swing at the plate and puts together good at-bats. He played just two games at East Coast Pro, but went 2-for-6 and squared up both his hits. He arguably caught the most attention at the Under Armour Game, where he was unfazed by the velocity on the mound. He got the barrel on a 99-mph fastball from RHP Riley Pint (St. Thomas Aquinas HS, KS) and snuck a single through the right side and then squared up a 93-mph fastball from RHP/SS Greg Veliz (Key West HS, FL) for another single. He struck out looking in his third at-bat on a borderline call. Throughout his at-bats, he put good swings on everything. Defensively, Kieboom has soft hands and a strong arm. He profiles at third base, but has spent some time at shortstop and behind the plate. Kieboom is committed to Clemson, where his brother was a catcher and drafted out of in the fifth round in 2012.