Tsuyoshi Nishioka tried to score from third base on a grounder to third in the fifth inning of a game against the Yakult Swallows at Jingu Stadium on August 23 and hurt his left leg. He was removed from the game in the bottom-half of the inning as a precaution.
The Hanshin Tigers took Nishioka off the active roster on August 24 with a minor bruise on his left heel. He is slated to begin a rehab program at Naruohama on August 25. The injury is not considered serious, but the Tigers are playing it safe because it is the same leg he hurt last year (Achilles tendon).
[UPDATE 8/27 @ 5:21pm]
Nishioka could begin playing in rehab games on September 1.
Source: Sanspo 8/27/2017
[UPDATE 8/30 @ 1:10pm]
Nishioka joined Ni-gun warm-ups at Naruohama on August 29. He resumed playing catch. He no longer has problems running. His schedule will be set and expanded based on his condition in the morning.
Source: Sanspo 8/30/2017
[UPDATE 9/1 @ 4:54pm]
Nishioka played in a Ni-gun game against Hiroshima on September 1. He started at first and batted third. He went 2-for-2 with a stolen base and an RBI. He was replaced by a pinch-runner in the third.
Nishioka recorded an RBI single to right in the first inning and stole second. He hit a single to left in the third inning and was replaced by a pinch-runner.
[UPDATE 9/4 @ 11:40pm]
Nishioka went 3-for-4 with a stolen base in two Ni-gun rehab games and is expected to return to the active roster on September 5.
Source: Sanspo 9/4/2017