That browning in summer may be due to mites. In winter it could be poor soil drainage causing soggy conditions. Unless you watered a lot soggy soil would not have happen in this past dry winter season. Other causes can be needle blight diseases, bagworms, or damage from weed and feed fertilizers applied to the turf nearby.
I suggest you take some up close and distant photos of the plants to your county Extension Office, or the Travis County Office (512) 854-9600, and see if with photos to look at they can provide a more specific diagnosis.
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