The Orix Buffaloes sent scouts to the US for about a month in August to check on talent (with a focus on pitchers) at the MLB and Triple-A levels.
Stefen Romero, Chris Marrero, and Brandon Dickson will be returning next year. The Buffaloes like Gonzalez Germen, but it is uncertain where he will end up next year. Phil Coke and Matt West struggled with injuries this year and are currently at Ni-gun.
Source: Sanspo 9/21/2017
[UPDATE 9/27 @ 5:42pm]
There is a good chance Coke and West will not return to the Buffaloes next year.
Source: Sanspo 9/27/2017
[UPDATE 9/29 @ 1:22am]
The Buffaloes announced on September 28 that Coke and Ikusei Darryl George will be returning to their respective homes soon (Coke to the United States and George to Australia).