Brown Circles and Centipede Grass dying
It looks like Large Patch disease, but it is a little late to have this disease active in Carteret County. The fix would be spraying a fungicide such as Heritage, Headway, or one of the over the counter products from a garden center such as Spectricide, Bayer Advance, Bonide, or Ferti-loam will all do a good job when applied at the right time in the fall. You may also want to read the information from Clemson University on this topic. http://www.clemson.edu/extension/hgic/pests/plant_pests/lawns/hgic2150.html I hope this helps some.