This is the patch of Queen City Roller Girls' officiating crew, the Buffalo Herd.
Note that this is not the same patch as their other officiating patch. The fabric is a different color, and this appears to have an irregular shape.
I can't tell if both patches in this picture have the same or different colored helmets. They look a bit different in this photo but it's really had to tell. Until I can verify they're different thread colors, I'll consider them to be the same patch.