The 20-year-old got some early extra work in with infield coach Ivan DeJesus, which is part of Cubs manager Mike Quade's plan. Castro will start Friday in Surprise against the Royals and is expected to play three straight games. That doesn't mean his extra tutoring won't stop.
Castro has made two errors in three games, and his first miscue prompted a meeting with Quade on Wednesday. The problem isn't lack of work. The emphasis will be more on practicing as if he's in a game situation.
"I don't believe we can do any more work," Quade said Thursday. "That's the frustrating thing from my end.
"We're working. The question to me becomes how better to work."