The Chunichi Dragons announced today that Dayan Viciedo temporarily returned to the United States to file paperwork for citizenship. He is expected to miss the Seibu series that began today.
[UPDATE 6/22 @ 6:36pm]
Viciedo was supposed to return in time for the Yomiuri at Tokyo Dome series that begins on June 23. As of June 21, he was still not with the team.
[UPDATE 6/24 @ 2:27pm]
The Dragons have heard from Viciedo. He finished his interview and is now working on the paperwork. The team is still not sure when he will be able to return.
Source: Sanspo 6/24/2017
[UPDATE 6/24 @ 6:53pm]
Viciedo was taken off the active roster today because the Dragons are not sure when he will be able to return to Japan.
Source: Sponichi 6/24/2017