Sho Nakata felt pain near the base of his right leg after flying out to second in the fourth inning and was later replaced on defense in the fifth inning of a game against the Orix Buffaloes on April 9.
Nakata first started feeling the pain when he swung the bat during his last plate appearance against the Buffaloes on April 8. He was examined (MRI) at a hospital in Sapporo on April 10 and diagnosed with a first degree adductor muscle contusion. He is considered day-to-day. He missed yesterday’s (April 11) and today’s Softbank games.
Source: Sports Hochi 4/9/2017, Sports Hochi 4/10/2017, Sports Hochi 4/10/2017, Daily Sports 4/10/2017, Daily Sports 4/10/2017, Tokyo Sports 4/12/2017, Nikkan Sports 4/9/2017, Nikkan Sports 4/10/2017, Sponichi 4/10/2017, Sponichi 4/10/2017, Sponichi 4/11/2017
[UPDATE 4/13 @ 5:23pm]
The Fighters decided to take Nakata off the active roster today as a precaution. He was able to take light pain-free swings today, but coaches were concerned about rushing his return.
[UPDATE 4/15 @ 10:20pm]
Nakata started a rehab program at Kamagaya today. His workouts included some light running, a game of catch, and soft-toss batting practice. Assuming no setbacks, he could join general Ni-gun practices on April 16. Beyond that, he might be able to play in a Ni-gun three-game series against Yakult that begins on April 18.
[UPDATE 4/17 @ 5:24pm]
Nakata participate in practices at Kamagaya today. During live batting practice, he took twenty-four swings and hit eight over the fence. He told reporters his leg felt fine and that he was only thinking about taking full swings of the bat.
Nakata took twenty-two swings during live batting practice yesterday and hit four over the fence.
[UPDATE 4/18 @ 5:43pm]
Nakata is set to play in a rehab game at Ni-gun on April 19 against Yakult at Toda. It will be his first Ni-gun game since 2010.
Assuming no problems, Nakata could return to the active roster on April 23.
[UPDATE 4/19 @ 3:59pm]
Nakata played in a Ni-gun rehab game today against Yakult. He started at designated hitter and batted clean-up. He recorded two plate appearances: foul out to third and a walk. He told reporters he felt fine and was able to swing the bat better than expected.
Source: Nikkan Sports 4/19/2017