I'm guessing Bradford is the last guy on the list, because that's the only way I can get things to add up the way the article says.
Note that Street is not on the 40-man roster, but if he makes the team, that's easily solved by sending Johnson back to St. Louis. Or maybe by putting Bradford on the sixty-day DL.
I'm not sure why John Baker was sent down and not Jeremy Brown. But the big news is probably that Kurt Suzuki is still around. He may have jumped ahead of both Brown and Baker in the hearts of A's management with his impressive spring.