Speaking during his post-match press conference at Old Trafford after the Reds were narrowly beaten 1-0 via Yohan Cabaye's solitary goal, the Reds manager was keen to explain why all three players were omitted after starting against Everton in midweek.
"Shinji was very sick after the [Everton] game and he did a bit of training on Friday but he was low,” Moyes explained. "All of the stats that we look at were low so we felt we had better not take a risk in case we got an injury by playing him."
Revealing more about Kagawa's health, as well as Fellaini and Smalling, the boss continued: "It was a bad sickness. He thinks he ate too much, and he had to get his stomach pumped, but I think he is okay. Felli had a bruised back and Chris Smalling had a tight hamstring, so that is why both of them weren't available."
Moyes was also asked about BBC Sport pundit Mark Lawrenson's claim that Robin van Persie "might have asked for a transfer", and the boss was quick to rubbish the rumour. He responded to a query from the press by saying: "Yeah, you can ask about that, no problem, and I would say that it is absolute nonsense. I don't know what other harder or tougher word I have got for it than that. That is as good as I have got."