Racing PositionsNats' Kieboom to get surgery, out for season2YNats put 10 on IL before opener, win on walk-off5YNats send projected 3B starter Kieboom to minors5YIgnoring 'Twitter World': Kieboom still at 3B5YNationals option Kieboom, activate Doolittle6YMLB players with something to prove in spring training6YCraig EdwardsNats' Kieboom leans on Notes app to prep for 3B6Y