The photos show galls. They are the tree's reaction to an insect laying an egg on the leaf. Although unsightly, they are not harmful. Some years there are a lot of galls and some years very few. There have been a lot of galls on all varieties of trees this year. As far as losing leaves from the ground up, if they are turning yellow before they fall, it may be anthracnose, also very common during humid, hot months. You can try to match symptoms by going to our diagnostic page. http://www.extension.umn.edu/garden/diagnose/plant/deciduous/oak/  Here is more information on anthracnose: http://www.extension.umn.edu/garden/yard-garden/trees-shrubs/anthracnose/