Sergi Roberto also scored in the 56th minute as the UEFA Champions League winners largely controlled their first match of the new season, delighting the biggest crowd for a club soccer game involving an MLS team in US history.
Tommy Meyer scored late in second-half injury time for the defending MLS champion Galaxy, denying Barcelona of a clean sheet, AP reported.
The record crowd largely supported Barcelona despite the absence of Lionel Messi and Neymar, who stayed home from the International Champions Cup tour to stay fresh for the games that count.