Originally Posted by Donald
Originally Posted by LubeFiner
As previously mentioned, it just appears to be stressed. It also appears you have a very heavy layer of thatch. Either rent a dethatcher or rake your yard, then use your mower to bag it if you have a bagger, or just bag the thatch in trash bags. Rent a plug aerator to aerate the lawn. Then spread some Milorganite down at the recommended rate, and water until you reach an inch of water twice a week for a couple of weeks. After two weeks, get more seed and over seed it, do another Milorganite treatment, then resume twice a week watering for two more weeks. Should be pretty green and full after that. If you are going to be receiving plenty of rain, forego the waterings.
https://www.milorganite.com/
It gets water via rain.
This time of year could one expect to find grubs? I obviously don't know but how long has it been damaged like this? What about Chinch bugs? Is that a possibility in your area?
Personally, like what has been said, I'd dethatch it then purchase some Scott's Grub X and water it in. I believe it kills Chinch bugs and some others as well.
Mine was more patchy than yours due to grubs and chinch bugs but the Grub X fixed it right up. I also fertilized with Scott's Iron Plus fertilizer and my lawn is currently looking great, imo.