The Rockies relayed Friday that Morneau has been experiencing neck stiffness as the result of a diving stop in Wednesday's game against the Angels, the Associated Press reports. Morneau's removal from Wednesday's game was initially attributed to an onset of dizziness, but Rockies bench coach Tom Runnells clarified that the first baseman now seems to be suffering from a spell of whiplash. It's not something that's expected to sideline him for extended action, but the Rockies figure to turn to Wilin Rosario for the duration of Morneau's absence.