The Nationals recalled Kieboom from Triple-A Rochester on Saturday, Jesse Dougherty of The Washington Post reports. The infielder has hit .236/.376/.385 with five home runs, 23 RBI and 26 walks in 44 minor-league games this season. Kieboom has appeared in only two games with the Nationals this season, both of which were in the first week of the season. Jordy Mercer (calf) was placed on the 10-day injured list in a corresponding move.
Kieboom (knee) was placed on the 7-day minor-league injured list Monday, freelance baseball writer Byron Kerr reports. Kieboom's knee injury has kept him sidelined since June 29, and it's not yet clear when he'll be able to return to action. His placement on the injured list will clear room on the Triple-A roster for Humberto Arteaga, who was outrighted to Triple-A Rochester as part of a corresponding move.
Kieboom is dealing with a knee injury and is unavailable for a promotion to the majors, Jesse Dougherty of The Washington Post reports. The Nationals are without both Jordy Mercer (quadriceps) and Trea Turner (finger), which has left the the team thin along the infield. While that may have put Kieboom in consideration for a promotion, he is unavailable with no timeline for his return to the field. Positively, he has performed well with Triple-A Rochester this season, posting a 118 wRC+ and striking out at only an 18.1 percent clip across 166 plate appearances.
Kieboom has made significant progress with his swing at the Nationals' alternate training site, Maria Torres of The Athletic reports. "His batting practices look totally different than they did in spring training," Triple-A Rochester manager Matt LeCroy said Monday, "He's ready to show people that he can play." The 23-year-old squandered another chance to lock down a starting role in the majors this spring due to his struggles at the plate, but the Nats haven't yet given up on him. Josh Harrison's hot start has taken away some urgency for the team to get Kieboom to the majors, but if the youngster rakes at Triple-A, he could put pressure on Starlin Castro, whose .253/.271/.341 slash line is below expectations.
Kieboom was optioned to the alternate training site Friday. The 23-year-old joined the big-league club for the first three games of the season due to the team's COVID-19 outbreak, and he'll head to the alternate site after going 0-for-1 with a walk in two games. Kieboom figures to head to Triple-A when the minor-league season begins unless the Nats have another emergency situation in the infield.