These are pictures of a lawn we service every week. Last week we showed up to do the mow and you could see the lawn had a little bit of browning in it over the entire lawn. To be expected for the weather we've been having. Flash forward to a week later and this is what it looks like. Obvious tracking from the mower and large brown spots. From the looks of it my thoughts were it was a combination of two things. Fungus and wilt. I can see it being fungus where the mower tracked from the brown patches, but as you can see in some pictures where the grass has just tracks where I suspect wilt. The lawn is irrigated, but not sure on the watering schedule. It was in the 90's all last week and very humid. I had a similar problem on this lawn last year and treated with fungicide and seemed to cure the problem. Just looking for any thoughts and second opinions.