Kieboom went 1-for-4 with a walk, a home run, two runs scored and two RBI for Triple-A Fresno on Thursday.
The Nats' top fantasy prospect showed no signs of sulking in his first game back with Fresno since losing his spot in the majors. It could be awhile before Kieboom gets another shot with Washington, but if he keeps dominating PCL pitching he'll earn a return trip later this season.