I realize it has been 2 months since you posted. Assuming things have not improved...
Do you have dogs or kids that play with cleats? It looks like holes dug in it. Do you have skunks, raccoons, possums, or other insect eating mammals? If you have those critters, then they might have been digging for grubs in your lawn. That would be excellent news, because then you know you're doing things right but just got unlucky in the grub lottery.
Seriously, measure how much water your putting on. Put some cat food or tuna cans out around in the green and dead spots and turn on your sprinkler. Time how long it takes to fill the cans.
If you don't have the critters, then you either have not enough water and the grass died from dehydration, or you have too much water and the roots rotted...and the grass died from dehydration.
_________________ David Hall Moderator Dirt Doctor Lawns Forum
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