re: Please Help ID this Grassy Weed (Update: New pics added.)

Thanks for all the tips. I'll definitely look into the pre-emergent as I haven't had an easy time finding a product like that. I will also keep at it with the Vantage to suppress as best I can. I think Gevans has it pegged. It appears that it is spreading to my yard from a neighbor's yard, and that neighbor has a lawn service. This neighbor also doesn't seem to care near as much about the lawn as I do, so even if I get it controlled in my yard, I suppose it'll never be truly suppressed.