Does your lawn have brown spots? Does the yard look dry? It has been raining a lot these past few weeks, so the yard probably isn’t dry. You may have a bug problem. Army worms and chinch bugs are popular lately. Either one of them (or both) could be causing these brown spots.
But for the most feasible cause of the brown spots, it’s most likely FUNGUS. Fungus is very common problem with lawn and landscapes during heavy rain. Make sure your rain sensor works and be sure you have a great pest control company.