airs nightly. Thank you once again. Now to the scrappy Chicago little league team who pulled off a victory to become U.S. Champs. They have the opportunity to become world champions later today. The... See More
airs nightly. Thank you once again. Now to the scrappy Chicago little league team who pulled off a victory to become U.S. Champs. They have the opportunity to become world champions later today. The little guys giving a big lift to the city's south side. I spent six years in Chicago. This is the best thing that's happened there in a long time. I spent five years there. What a game it was. Last week, Las Vegas and Chicago played. Las Vegas pounded the Chicago team. This time, the team from Chicago, who lost last time 13-12. This time, a rematch with a very different outcome. A seesaw game with the leads exchanging several times. And a lot of drama. This morning, the team from the south side of Chicago swinging history and into the hearts of the nation. I feel great. U.s. Champions. It's ridiculous. Reporter: Jackie Robinson west in a nail biter against las Vegas, the same team that beat them a week ago. Las Vegas scored three runs in the top of the first. Chicago bounced back. Trey hondras pounding one to right. And then another great hit. This one ripped to right field. It's going to go! Reporter: Vegas came roaring back in the fifth. A two-run homer seeming to leave Chicago visibly shaken. Two strikes. He's beside himself. Reporter: Jackie Robinson west battled back. Three times in that inning. They end the game with a lightning quick double play. Back to the pitcher. Double play ball. Jackson, it's over! Chicago wins the United States championship! Reporter: The boys now hometown heroes. Chicago celebrating in community centers, cubs fans cheering at Wrigley field. Even a shoutout from the Chicago bulls on Twitter. I thought it was, like, Mike was still playing. Reporter: They'll be cheerg again today with Chicago set to face South Korea in the final. The top little league team in America hoping to become the best in the world. And Jackie Robinson west is not just a success story in their own right. They're part of little league's urban initiative started 15 years ago to support leagues and teams in inner city neighborhoods. A terrific program. Clearly showing results. Whatever the outcome today, the city of Chicago intends to have a parade on Wednesday when they come back. And they have great parades in Chicago. I love when the kids said, it's us. This is ridiculous. It's amazing. Can grach lagss to them. Make sure you don't miss Chicago as Ron mentioned taking on south Korea in the little league world series championship game. This afternoon, 3:00 eastern, noon pacific time, right here on ABC. I feel bad for Jason now
This transcript has been automatically generated and may not be 100% accurate.