Williamson signed with the Nationals as a non-roster invitee Wednesday, Bob Nightengale of USA Today reports.

The 29-year-old hasn't put things together over parts of five seasons in the big leagues, hitting .203/.282/.348 in 483 plate appearances. He played 40 games for the Samsung Lions of the KBO last season after getting designated for assignment by the Mariners, but his .273/.327/.409 line there doesn't exactly suggest he suddenly figured things out.

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