"Chicago Cubs pitcher Carlos Zambrano will undergo an MRI scan on Monday in Chicago on his right elbow after having to leave Saturday's game early because of tightness," reports MLB.com. "'He was going back [to Chicago] for the off-day anyway,' Cubs athletic trainer Mark O'Neal said Sunday about Zambrano. 'While he's home, basically for precautionary reasons, we'll send him back and get it checked out so we know exactly what we're dealing with.' . . . He has some soreness both above and below his elbow, and the pain below the elbow is new, Zambrano said."