Kieboom cleared waivers and was outrighted to Triple-A Rochester by the Nationals on Wednesday, Mark Zuckerman of MASNSports.com reports.
Kieboom went 1-for-4 with a three-run home run, a walk and an additional run in Friday's 10-6 win over Atlanta.
Kieboom is absent from the lineup for Thursday's game versus the Pirates, Bobby Blanco of MASNSports.com reports.
Kieboom is not in the lineup Wednesday against the Pirates.
Kieboom is out of the lineup for Monday's game against the Pirates, Andrew Golden of The Washington Post reports.
Kieboom isn't in the Nationals' lineup Saturday against the Dodgers, Mark Zuckerman of MASNSports.com reports.
Kieboom is out of the lineup for Sunday's game against the Marlins, Mark Zuckerman of MASNSports.com reports.
Kieboom went 2-for-4 with a two-run home run in Tuesday's 5-4 win over the Blue Jays.
Kieboom is out of the lineup for Monday's game against the Blue Jays, Andrew Golden of The Washington Post reports.
Kieboom is starting at third base and batting fifth Thursday versus the Yankees.