Don't want to step on anyone, however a granular has to be put down way before a fungus is established. Granulars must be activated into the soil, penetrate, then be taken up by the plant. By then if already infested the fungus has spread more and more and a viscous cycle has begun. A practice of applying a fungicide during the last of April-Mid October monthly (Coastal) generally keeps a lot of brown patch away. Even then it is applied as a systemic and folliar by spraying. You might have to wait until some others get in to answer the granular fungicides. Sorry I couldn't help.
We all are merely gleaners from the masters who were here before us.