For MLS teams, the early rounds of the U.S. Open Cup might not carry much significance. They won’t come in until the Fourth Round, and even then play a rotated squad against a lower league opponent. For the lower division teams, however, the Open Cup means a chance to put themselves on the biggest stage possible. It’s a tournament unique to the American pro sports scene, bringing together all adult levels of the sport into a single competition. For American soccer fans across the country, it is magic. It is the oldest soccer competition in the U.