What is a good product for fungus in a fescue lawn?

I think I have a fungus in my fescue lawn. Probably from over watering as I also have seen a few patches of small mushrooms. The fescue has some brown spots in it, not sure if it is “brown patch” but I think it is a fungus. Any recommendations for products or treatment of this? The brown grass seems to be dead and pulls out easily by hand as opposed to healthy green blades that resist being pulled (healthier roots?) Live in Southern California but it has been cool and moist the past several weeks.