SOUTH WILLIAMSPORT, Pa. -- Brad Stone hit a grand slam in the first inning and Las Vegas hit five home runs in a 13-2 win over Chicago's Jackie Robinson West on Sunday.
First baseman Austin Kryszczuk homered twice, in the second and fourth innings.
Chicago's Pierce Jones, who hit three home runs on Thursday, went 0-for-2 with a walk.
Jun Hyeok Yun stole home to score the go-ahead run and South Korea beat Puerto Rico 8-5 in the Little League World Series on Sunday.
Entering as a pinch runner, Yun raced home after teammate Hae Chan Choi drew a throw to second base from catcher Jeremy Colon in the top of the sixth. South Korea added two runs later in the inning and Jae Yeong Kim pitched a perfect bottom half of the inning.
Awaiting South Korea on Wednesday is the winner of Mexico vs. Japan.
Information from The Associated Press was used in this report.