LAFC qualify for the last eight of the Open Cup.
And one of their stars was young Ghana midfielder Latif Blessing.
Latif Blessing (Ghana) - aged 22, rated at 1.25m euros, medium height attacking midfield, mostly right foot pass, tenacious, busy with a burst of pace, active in producing this victory.
Although the new Banc of California stadium was not full for this Cup encounter the ultras (La 3252) section was packed.
And they maintained noisy support throughout.
LA are on a roll topping their Western Conference, and they will be expected to go far in the Cup.
But lacking a few regulars at the CONCACAF Gold Cup they did get exposed in central defence and that allowed the visitors to take the lead on seven minutes.
LA might even have gone further behind as SJ had a plausible shout for a penalty denied.
However, the home talent eventually prevailed.
Illustrated by Diego Rossi's neat chipped finish to equalise that early goal.
And by star man Carlos Vela's typical left foot clincher late in the game.
Vela, the winner of various recent awards, always looked sharp.
He was aided in the middle by the efforts of Latif Blessing (see above)
Hence ultimately the class of the home side told despite those early defensive shortcomings.
But they were also fortunate that stand-in goalie Pablo Sisniega was outstanding - stopping a number of one-on-one breaks by the Quakes.
report & analysis - John Bethell