"Everything is great," Sveum said. "He'll do a normal day today. He'll probably play Monday or Wednesday depending on what we decide with the day off on Tuesday."
Castro has been out of the lineup since injuring his hamstring on Feb. 27 while running out a ground ball. On Wednesday he indicated he would like to be back playing by this weekend.
"They had me running (40 yards) the last couple of days and it feels fine," Castro said. "I feel good and I don't have any pain right now."
Sveum indicated Thursday might be a "recovery day" for Castro and reiterated the injury isn't serious.
"If it was opening day he'd probably be playing at 100 percent," Sveum said.