Moss comes in many shapes and sizes. Hard to tell at that focus level and that distance.

What is your watering schedule (frequency and duration)?
Do you have shade in much of the yard?
How high/low do you mow?
When were the last 2 times you fertilized and what did you use?
What herbicide did you use on this weed?

Hello, thanks for your response. I think you are right. I googled some images of moss varieties and it lolls like it could be stonecrop sedum acre. I bought the house last summer and did not fertilize until early May with weed and feed. A couple of weeks later I dumped some Weed B Gone on it. It didn't look like it did much to be honest. So I started pulling it up.

My guess is that the previous owners had this down at some point,, then put some grass down later. It is under a big tree so there is some shade.

I have not watered but it is something to think about going forward. Michigan was very rainy last year so I never bothered.

So assuming this is stonecrop, is there anything I should do to ensure this goes away and stays gone?

stonecrop is not difficult to eradicate by hand pulling. I had some in my vegetable garden. It may take two springs to complete the job as you always miss a little bit of it.