http://www.fifa.com/news/y=2018/m=3/news=the-week-in-numbers-6.html says: "4 goals is what three Robin Hood players scored in a 15-0 demolition of Young Men’s Social Club. John Barry Nusum called on his side to win by five in the penultimate round, to give themselves a chance of pipping PHC Zebras to the Bermudan Premier Division title on goal difference, but quartets from Antwan Russell, Lejuan Simmons, Shakir Smith ensured they tripled that target." Robin Hood has a hypothetical but not realistic chance at the title with 1 game left. Robin Hood trails by 3 points and 12 goal differential. PHC Zebras are in first and end at YMSC, who has 2 points from 17 games and allowed the 15 goals. FIFA calls them "Young Men's Social Club" and Soccerway uses an acronym. What's the biggest of victory you can find between two CONCACAF national teams or clubs?
Costa Rica 12-0 Puerto Rico in 1946 Honduras 10-0 Nicaragua in 1946 Guatemala 10-1 Honduras in 1921. I found these for Central America.
El Salvador 12-0 Anguilla 2008 World Cup Qualifying America 10-1 Puerto Rico Bayemon 2014 CCL Cibao (Haiti) 16-0 Police (Montserrat) 2017 Caribbean club championship These are the ones I know of from recent memory but there most be others that where even more lopsided
That's bigger than what I found. Cibao is in Dominican Republic. The biggest one I have memorized is Mexico 10-0 Dominica in World Cup 2006 Qualifying on June 19, 2004 when Dominica played their "home" game in the USA. Mexico also won by at least 10 in 13-0 over Bahamas on April 28, 1987 and 11-0 over St. Vincent and the Grenadines on December 6, 1992. Costa Rica has two wins by at least 10, 11-0 over Panama on February 16, 1938 and 12-0 over Puerto Rico on December 10, 1946. USA never won by at least 10.