All indications were that Morgan would be cleared to return to the field on Monday, but when Morgan felt what he described as a "baby charley horse" while turning during his on-field sprints, he decided another day of rest was in order.
"When I make that little slight turn, I've got a little knot in there," Morgan said shortly after coming off the field. "I don't want it to linger. There are still 130 games left to play. I have to look at it and be smart about it and not doing anything stupid and be out for the rest of the season for something so minute. It's nothing major in my eyes, but I want to be on the safe side."
Monday will be the third consecutive game Morgan has missed after tweaking his left hamstring fielding a ball late in Friday's game. Morgan said he felt no discomfort while running straight ahead. It was only when he turned to the right and the left that he felt a slight pain.
With Morgan scratched, Russell inserted Delwyn Young into the leadoff spot and into right field. Craig Monroe, who was initially scheduled to start in right, shifted to left. Young went 4-for-9 with two runs scored and three RBIs from the leadoff spot in Morgan's absence over the weekend.
Jenifer Langosch is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.