Chris Martin and Yadir Drake were taken off the active roster on October 5. They are expected to return to the respective homes soon.
Martin is open to returning next year, but Nippon Ham will only be one of what might be many options. Drake will most likely not be offered a new contract by the Fighters for the 2018 season.
Source: Sponichi 10/5/2017
[UPDATE 11/10 @ 8:52pm]
The Nippon Ham Fighters announced today that Martin and Drake will not return next year.
Source: Nippon Ham 11/10/2017
[UPDATE 12/12 @ 11:27am]
Martin signed a two-year contract with the Texas Rangers.
Source: Daily Sports 12/12/2017