I don't think people assume it but it is a reasonable concern. No football in almost 15 months. Reports in camp was that he was looking slow. He got 2 more months to strengthen that knee and leg. Williams has not been great but he's not been terrible either.
Difficult thing will be is that McD doesn't sub his back 7. Probably will make an exception with Milano if he dresses. But I can see McD babystepping this one and just has him dress but not take the field.