Weed Identification?

This is my first year as a homeowner so I apologize if this is a very basic or non-sense question. I noticed quite a few of these (picture below) growing in my lawn, and would like to ask for feedback as to whether that is a grass weed, and if so what kind it is. Attachment 50210 (http://www.doityourself.com/forum/attachments/lawns-landscaping-outdoor-decor/50210-weed-identification-img_3939.jpg) Thank you