OK - I see what's happening. There is a new option when posting that I never noticed before called "Automatically retrieve titles from external links". I'm guessing that when I turn it off, it will post the actual URL (or the text I put in place of the URL). So, with the option turned off, it stays as:
http://www.nfl.com/
Whereas, with the option turned on, it becomes:
NFL.com - Official Site of the National Football League
What I can't find is how to set the default to be turned off.