Reference

The search results did not provide direct information on a specific instance of San Juan being excluded from a competition. However, one result mentioned an anti-trust and civil rights lawsuit was filed against the Puerto Rican Winter Baseball League and its teams. This lawsuit alleged concerted action with the Mayor of San Juan to exclude and replace a business operated by Tom Axon, although it does not explicitly pertain to a competition in the traditional sense source.

If you were referring to a sports or other type of competition, further clarification or specifics could help narrow down the search.