Tsuyoshi Nishioka was not available to play in last night’s (September 12) game against the Yomiuri Giants because of tightness in his back. He was listed as available, but was unable to play. His status moving forward is uncertain.
Source: Sanspo 9/13/2017
[UPDATE 9/13 @ 5:05pm]
Nishioka was taken off the active roster today. He was examined at a hospital after pre-game practices on September 12. He rested at home today.
Source: Nikkan Sports 9/13/2017