Ok, went out this morning and inspected more. Pulled a couple of plugs and realized roots were probably around 4" in both spots. Soil was moist in both spots.
I was somewhat mistaken when I said the green spots pulled up like carpeting. They were so long that I just thought it was all coming up. This morning, I tugged against the direction they were matted and they just pull up so far, it felt like I was pulling them out by the root. When I tugged in the direction of the matting, they pretty much stayed put. It's folded near the soil so it's almost like expanding an accordion, if you know what I mean.
The browner grass is exactly 3". I'm estimating the matted grass is in the neighborhood of 6" minimum.
So, how do I proceed from here? Looks like a week before warm fall temps are over for good. The only mower I currently have is a manual reel mower with about 2.5" height max. I plan on buying a riding, or zero-turn, this coming spring. Do I just wait until spring to deal with this or is there something I can/should do now?
Thanks for the ongoing help everyone.
An image of the matted spot pulled up
View attachment 3197