Maryland's Omar Gonzalez scored both U.S. goals
Gustavo Pinedo of Spanish club Cadiz scored two goals of his own in the 47th and 81st minutes to open and close Bolivia's second-half flurry. Also scoring for Bolivia was Limberg Gutierrez, one of Bolivia's two overage players in the U-20 competition, and Eduardo Fierro.
The U.S. will face Mexico on July 21.
June 18 in Rio de Janeiro
USA 2 Bolivia 4. Goals: Gonzalez 34, 41; Pinedo 47, 81, Fierro 56, Gutierrez 63.
USA -- Gross, Alston, Eckhardt (Cruz, 76), Gonzalez, Stephens, McCarthy (Warshaw, 68), Hall, Folk, Myers, Kelly (Marosevic, 61), Anibaba.
Bolivia -- Lampe, Aguilar, Tordoya, R.Gonzalez, Torrico, Gatty, Pena (Juarez, 67), Fierro (Aguino, 80), Gutierrez (Vejarano, 90), Pinedo, Bejarano.