Michael O’Neill’s side went down 5-1 in Palma despite Daniel Ballard’s early opener.
35,038 fans turned up to Wrigley Field to make NWSL history.
Over 90 minutes Saturday at Commanders Field, a test turned into an embarrassment, the worst defeat of the Gregg Berhalter era, and the worst possible start to what should be a special summer.
Daniel Ballard had headed Northern Ireland into a shock lead with 70 seconds on the clock in Palma.