"Nishioka's X-rays showed good healing," assistant trainer Dave Pruemer said. "We're progressing him to more land-based exercises and baseball activities."
Pruemer said there is no timetable yet for Nishioka's return.
"The next few days, we'll see how it goes," Pruemer said.
Nishioka has been hitting in the cage and throwing, but has not taken ground balls.
"No heavy cutting yet," Pruemer said. "We'll progress to that probably in the next four to five days."