Mushrooms are a symptom of fairy ring disease. The disease occurs usually when you have too much organics in the soil and don't allow the moisture to drain/ dry out in between waterings. Fungicides for this are extremely expensive and probably illegal to use on residences.
Something to think about:
- manure will increase the presence of this disease because of the organics.
- check for surface drainage issues
- aerate and remove cores if you can.