I have noticed that my grass looks withered in certain spots. This just started about 5 days ago. Does anyone know why?

You may have a fungus. Try a fungicide like F-Stop or liquid Trichlor. Harvey blew in a tin of issues for our lawns. It's been a battle for me, too! Good luck. Keep us posted.

Is there any pattern to it, such as mainly beside the paving? Has it been watered/fertilized? Any pesticides applied?

There isn't a pattern to it. I fertilized the grass in March and I haven't applied any pesticides.

Okay. Thanks