AJ Jacobs was removed from the connection finder months ago.
Now you can only connect to him if your connection is less than 10 degrees. Since yours is 21 degrees, you wont be able to see a connection to him unless or until he gets put back into the connection finder.
Oh and since he is still a living person, his profile is now unlisted so you wouldn't be able to connect with him anyway.
The connection finder now can only have names of people who have died. That is why Queen Elizabeth was removed from the Connection Finder as well.