The United States used all four allotted swaps to its Gold Cup roster between the group and knockout stages. Three other countries - Mexico, Honduras and Trinidad & Tobago - switched one player each.
Jurgen Klinsmann dropped Herculez Gomez, Oguchi Onyewu, Jack McInerney and Corey Ashe. In their steads, he called in Omar Gonzalez, Matt Besler, Alan Gordon and Eddie Johnson.
Gomez scored against Guatemala in a 6-0 friendly buildup to the tournament. In two Gold Cup appearances (one start, against Cuba) he failed to score. He will join up with new team Club Tijuana ahead of the Liga MX season.
Onyewu also started against Cuba. McInerney and Ashe haven't seen any minutes in the Gold Cup.
Besler and Gonzalez established themselves as the first-choice center back pairing during a five-game spell in June. Gordon and Johnson have popped up with key goals for the Yanks in World Cup qualifying.
Mexico swapped out Monterrey defender Darvin Chavez for Morelia midfielder Jose Maria Cardenas.
Erick Norales replaces fellow defender Johnny Palacios for Honduras, and T&T called up Columbus Crew midfielder Kevan George in exchange for Khaleem Hyland.
Panama, Cuba, El Salvador and Costa Rica did not make any changes.
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