The workout was a month ago, according to the article. Plus I don't think people realize how common this is, for an unsigned player to work out with the team. It happens all the time during the week, even during the regular season. It doesn't always mean something. Just a chance for the player to get some work in and the team to rest some of their guys. Plus, with Brooks being from Newport News, VA Redskins Park is just a few hours away.
Of course, if the Redskins sent someone down to work Brooks out then just ignore everything I wrote in this post