Kieboom (lat) returned to the Triple-A Syracuse lineup Tuesday and has gone 1-for-7 with a double, three walks and a run while playing in both of the team's last two games.

Nationals manager Dave Martinez said Monday that Kieboom hasn't played in any of Triple-A Rochester's last four games due to right lat soreness, Jesse Dougherty of The Washington Post reports.

Washington activated Kieboom (shoulder) from the 10-day injured list and optioned him to Triple-A Rochester on Sunday.

Kieboom (shoulder) will begin a rehab assignment with Double-A Harrisburg on Wednesday, Mark Zuckerman of MASNSports.com reports.

Kieboom (shoulder) is hitting in the cage and making throws across the diamond, Bobby Blanco of MASNSports.com reports.

The Nationals placed Kieboom on the 10-day injured list Thursday with a right shoulder impingement.

Kieboom (shoulder) is playing catch Sunday but has yet to throw across the diamond since suffering a setback two weeks ago, Jesse Dougherty of The Washington Post reports.

Nationals manager Dave Martinez said that Kieboom is dealing with shoulder discomfort and the club will slow him down and manage his return to the field, Andrew Golden of The Washington Post reports.

Kieboom (elbow) is making his Grapefruit League debut Thursday versus the Marlins, Bobby Blanco of MASNSports.com reports.

Kieboom (elbow) is expected to be limited to DH duties in the Nationals' early slate of Grapefruit League games, Mark Zuckerman of MASNSports.com reports.

Kieboom underwent Tommy John surgery Friday, Jessica Camerato of MLB.com reports.

Kieboom (elbow) will undergo season-ending Tommy John surgery, Jesse Dougherty of The Washington Post reports.

Kieboom (elbow) has resumed throwing Thursday, making approximately 20 tosses at a distance of 60 feet, Mark Zuckerman of MASNSports.com reports.

Manager Dave Martinez said Wednesday that Kieboom (elbow) has yet to begin a throwing program, Mark Zuckerman of MASNSports.com reports.

Kieboom (elbow) was expected to resume playing light catch last week, Jessica Camerato of MLB.com reports.

Kieboom has been diagnosed with a sprained UCL in his elbow in addition to a flexor mass strain in his forearm, Chelsea Janes of The Washington Post reports.

Kieboom (elbow) was placed on the 60-day injured list Monday, Matt Weyrich of NBC Sports Washington reports.

Kieboom said Sunday he is expected to require 4-to-6 weeks to recover from the flexor mass strain near his right elbow, Mark Zuckerman of MASNSports.com reports.

Kieboom (forearm) has been shut down from baseball activities and could begin the season on the injured list, Chelsea Janes of The Washington Post reports.

Kieboom has been diagnosed with a flexor mass strain in his right forearm, reports Mark Zuckerman of MASNSports.com

Kieboom was scratched from Friday's lineup due to right elbow soreness and he will have an MRI on Saturday, Jessica Camerato of MLB.com reports. "It worries me a little bit," manager Dave Martinez said.

Kieboom was scratched from the lineup for Friday's Grapefruit League matchup against the Marlins for an undisclosed reason, Mark Zuckerman of MASNSports.com reports.

Kieboom will compete with Maikel Franco for the starting job at third base during spring training, Jesse Dougherty of The Washington Post reports.

Kieboom (forearm) is in the lineup for Sunday's game at Cincinnati, Jesse Dougherty of The Washington Post reports.

Kieboom (forearm) had an MRI come back clean and is available off the bench Saturday at Cincinnati, Pete Kerzel of MASNSports.com reports.

Kieboom (forearm) remains on the bench for Saturday's game against Cincinnati.

Kieboom was scratched from Friday's lineup against the Reds due to a left forearm injury, Mark Zuckerman of MASNSports.com reports.

Kieboom was scratched from Friday's lineup against the Reds for an undisclosed reason.

Kieboom (thumb) is starting Wednesday's game against the Marlins.

Kieboom's absence from the lineup for Tuesday's game against Miami is due to a jammed thumb, Mark Zuckerman of MASNSports.com reports.

Kieboom is not in the lineup for Tuesday's game against the Marlins, Mark Zuckerman of MASNSports.com reports.

Kieboom will sit Sunday against the Pirates.

Kieboom went 4-for-8 with a double, three runs scored and an RBI across both games of Saturday's doubleheader split with the Mets.

Kieboom went 1-for-4 with a two-run home run and a walk during Tuesday's loss to the Phillies.

Kieboom went 2-for-4 with a solo home run and a second run scored in Monday's 7-4 loss to the Phillies.

Kieboom went 0-for-3 with two strikeouts and a walk in Sunday's 9-4 loss to the Mets.

Kieboom went 2-for-4 with a home run and two RBI in Wednesday's 9-5 loss to the Phillies.

Kieboom went 2-for-4 with a two-run home run and a second run scored in Monday's 7-5 loss to the Phillies.

Kieboom will start at third base and bat sixth Sunday against the Cubs.

The Nationals recalled Kieboom from Triple-A Rochester on Saturday, Jesse Dougherty of The Washington Post reports.

Kieboom (knee) was placed on the 7-day minor-league injured list Monday, freelance baseball writer Byron Kerr reports.

Kieboom is dealing with a knee injury and is unavailable for a promotion to the majors, Jesse Dougherty of The Washington Post reports.

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."

Kieboom was optioned to the alternate training site Friday.

The Nationals recalled Kieboom from Triple-A Rochester ahead of Tuesday's season opener versus Atlanta, Mark Zuckerman of MASNSports.com reports.

Kieboom was optioned to Triple-A Rochester on Saturday, Jesse Dougherty of The Washington Post reports.

Starlin Castro will get the start at third base for Tuesday's Grapefruit League game against the Cardinals, and the Nationals may be considering alternatives to Kieboom at the position, Mark Zuckerman of MASN Sports reports.

Kieboom still appears set to be the Nationals' starting third baseman this season despite his poor spring, as potential alternative Starlin Castro has yet to take any reps at the position in camp, Matt Weyrich of NBC Sports Washington reports.

Kieboom has gone 4-for-22 (.182) with only one extra-base hit, a triple, through his first nine Grapefruit League appearances.

Kieboom underwent LASIK surgery over the offseason, which hitting coach Kevin Long said Tuesday is already having a noticeable effect, Mark Zuckerman of MASNSports.com reports.