Morse was in the original lineup playing third base, but was scratched in favor of Jerry Hairston Jr. According to Riggleman, Morse had symptoms similar to reliever Sean Burnett, who missed Saturday's game against the Mets.
"Morse is not feeling well at all," Riggleman said. "He was like Burnett was the other day. He was really hit with the flu or something."
LaRoche, who injured his groin against the Mets on Sunday, believed he was well enough to play, but Riggleman and the training staff felt differently. LaRoche was not happy that he was not in lineup, but understood the manager's decision. He said he did everything he could do to get into the lineup "except throw blows."
"I feel like I could get through it. Sometimes it kind of gets put out of your hands," LaRoche said. "I would love to go, but I understand if something did happen, it would come back on other people. It's very, very frustrating. I just hate missing games.
"I'm not blaming anybody. It is what it is. If I was making out the lineup, my name would be in it. That being said, I don't always make the smartest decisions. That what those guys get paid to do. We don't see eye to eye on it, but I'm not going to throw a manager, GM, trainer or anybody under the bus at all."
The day off will at least give LaRoche's shoulder some rest. He is also nursing a slight tear in his left rotator cuff.