In 2016, Bass played with the Hokkaido Nippon-Ham Fighters. The 29-year-old went 8-8 with a 3.65 ERA in 37 appearances (14 starts).
Bass' signing brings the Rangers' total of non-roster invitees for Spring Training to 19.
Oliver Macklin is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.