[Cincinnati guy]

Noticed this spot while mowing my yard. Also seen one spot that looked white.

 

[g-man]

I was waiting to see if anyone else noticed it. I saw in a neighbor house on the way to the pool yesterday. It is slime mold and harmless.



More info here:
https://plantscience.psu.edu/research/centers/turf/extension/factsheets/managing-diseases/slime-molds