"I think Mark's a bit unsung in a lot of the things he does for the team. He's been there for us most weeks and we need him." Said Moyes
"He's comfortable in the role we want him to play plus he can play in the middle. His versatility and experience have been vital and he covers a fantastic amount of ground in the games he plays. It is a worry because he's had injuries there in the past. Mark was worried about it as well.
"He hasn't pulled the calf and it could even be down to something he's eaten. But we are not taking any chances and that's why he went to see the specialist about it. It's hard to say how long he'll be out. Obviously we don't want him to do any damage but then again it could all be nothing."