Luis Cruz was taken off the active roster on June 11, most likely because of lingering pain in his left ankle. He left for the United States for second opinions on June 14. His tests ended on June 17. He is now expected to return to Japan to start a rehab program.
Cruz opted for nonsurgical treatment and will probably require about a month for a recovery.
Source: Sanspo 6/18/2016
[UPDATE @ 10:40pm]
Cruz returned to Japan on June 17. He visited Giants Stadium earlier today to give the team an update on his status.
Source: Nikkan Sports 6/18/2016