Kieboom will work at shortstop and second base this offseason, Mark Zuckerman of MASN Sports reports.
Kieboom only played shortstop this last season, but the Nationals are considering adding second base to his repertoire to aid his climb to the majors. Current shortstop Trea Turner is under team control for another four years, but second base is being held down by the combination of Howie Kendrick (Achilles), Wilmer Difo and Adrian Sanchez. After slashing .262/.326/.395 at Double-A Harrisburg this past season and performing well in the Arizona Fall League (.280/.426/.347), Kieboom could push for time in the big leagues if he can hit Triple-A pitching well enough.
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.
Kieboom is hitting .263/.324/.378 with three home runs and one steal in 170 plate appearances with Double-A Harrisburg.
At 20 years old, he is the second-youngest hitter in the Eastern League (behind Bo Bichette), so he shouldn't be dinged for forcing a promotion from High-A and struggling (relative to his standards) over his first 39 games at Double-A. His approach has suffered after the promotion, with his walk rate dipping (from 12.6 percent to 7.6 percent), strikeout rate increasing (from 17.5 percent to 24.1 percent) and pull rate spiking (from 42.9 percent to 53.9 percent). His track record suggests he will make the necessary adjustments.
Kieboom was promoted to Double-A Harrisburg on Thursday, Jorge Castillo of The Washington Post reports.
Kieboom continued to exceed expectations at the High-A level, slashing .298/.386/.494 with 11 home runs, 46 RBI and six stolen bases for Potomac in 61 games this season. The infielder is listed as the club's No. 3 prospect and will likely spend the remainder of the 2018 campaign learning the ropes at Harrisburg. Though he's a fine defender at shortstop, Kieboom's eventual home in the majors may wind up being second or third base.
Kieboom went 2-for-5 with a solo home run and a stolen base for High-A Potomac in Sunday's win over Lynchburg.
The Nats' No. 3 fantasy prospect has been on a tear lately, hitting safely in nine of his last 10 games with a .351 (13-for-37) batting average, four homers, two steals, 12 runs and 14 RBI. Kieboom now has a .296/.386/.491 slash line through 56 games at High-A with 10 home runs, six stolen bases and a strong 34:48 BB:K, and the 20-year-old seems headed for a promotion to Double-A before the summer is over.
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