Nishioka's wife, Japanese fashion model Naoko Tokuzawa, gave birth to a daughter Monday in Minnesota. Sena Nishioka was born at 8:26 a.m. CT, and weighed 6 pounds, 9 ounces.
"Nishi's at the hospital with his wife right now," Twins manager Ron Gardenhire said two hours before first pitch. "He'll be here later, he'll do his work in the cage, and then he'll come off the bench if I need him."
Nishioka also sat out Saturday's game at Target Field, and has been out of the lineup more often lately as he's struggled at the plate over the last three weeks.
In his last 21 games entering Monday, Nishioka was batting .181 with more strikeouts (15) than hits (13). He did not have a walk or extra-base hit over that period, either.
With Nishioka's wife having a baby Monday, Gardenhire gave him another night off.
"It'll give him the chance to sit back and relax a little bit, he's had a lot going on today," Gardenhire said. "We talked about that. He wants to be here for the game, and that's if everything is OK with his wife and the baby. As we hear right now, it is, but he'll let us know when he gets here."