First baseman James Loney developed a tight calf muscle, believed caused by new shoes, and was scratched from the starting lineup for the day's game against the Rockies. Manager Don Mattingly said he expected Loney to be "down a day or two, but don't expect it to be more."
Jerry Sands replaced Loney at first base and Scott Van Slyke took over left field.
Reliever Matt Guerrier "felt something in his back" while doing exercises and will be down "for a few days," Mattingly said.
And reliever Ronald Belisario was hospitalized with strep throat and will be out until he's no longer contagious.
Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.