That could be one of the sedges. The attached loink might be of some help in controlling them.

Here is a link that might be useful: About sedges

Yes, I'm waiting for the Sedgehammer that I bought from eBay but worry it doesn't kill that kind of weed (Right). That's why I want to make sure it is type of nutsedge.

I have this grassy weed(?) in my lawn that is expanding and killing the regular turf grass. It doesn't respond to Weed B Gone and seems to be more drought-resistant in the summer (stays green) but in winter the whole patch becomes yellow. Should I keep or eradicate it? Thanks for any information.