Those would be the Phillies, the Mets, the Nationals, the Reds, the Rockies, the Red Sox, the White Sox, The Yankees, the Dodgers, the Athletics, the Royals, the Twins. Granted The Angels, Astros (short for Astronauts) and Mariners, don't easily fit this category. But this category needs teams, so we lump them in for the good of baseball. Alternatively, these teams could be required to change nicknames for the sake of consistency. The Seattle Caffeine, for example.