The United States beat Argentina 28-0 in the final to win their first tournament since London 2015.
Argentina, appearing in their 14th Sevens final had won twice on US soil before, but were unable to resist the power and pace of the US team, who went unbeaten through the weekend.
They had earlier beaten England 17-12 in the quarter-finals and Olympic champion Fiji 19-7 in the semis.
The pacy Baker ran in two tries against Fiji and scored again in the final, taking his try total to 158.