With runners on first and second, an error by the shortstop on what could have been an inning-ending double play loaded the bases for California. After a force play at the plate, the 12-year-old Pratto smacked a solid liner off a 2-0 pitch for the game-winning hit.
He tossed his helmet into the air after rounding first before his teammates mobbed him in the infield.
"USA! USA," yelled fans before Pratto's single.
The teams exchanged handshakes at the plate before California's giddy players posed at the mound with their new championship banner.