Ballesteros is out of the lineup for Wednesday's game against the Rockies.
Left-hander Sean Sullivan will start for the Rockies, so the Cubs will send the left-handed Ballesteros to the bench and swap a righty bat in Matt Shaw into the lineup. The Cubs have gone out of their way to shield Ballesteros from lefties this season, with the 22-year-old having logged just eight of his 175 plate appearances against same-handed pitching.