Defrosted ground beef?

I am defrosting about two pounds of ground beef that I had frozen a day before the expiration date. It is about half way thawed and it looks strange. Alot of the blood has drained out of it and has collected at the bottom of the ziplock bag, and the meat looks very pale. But it smells like it is ok, and it was fresh and very red when I froze it. Do you think it is safe to eat? What happened to it? Its only been frozen about a week.