( CNN ) They made America feel good , those kids from Chicago 's South Side who beat the odds and beat all contenders en route to the U.S. Little League championship . But now those feelings , like the championship , are no more . Little League International announced Wednesday that it is vacating all of the Jackie Robinson West squad 's wins from last year 's tournament , including from the Great Lakes regionals and U.S. championship , because some of its players lived outside its assigned boundaries . Mountain Ridge Little League , out of Las Vegas , officially becomes the 2014 U.S. champ in its place . The international youth baseball organization also suspended Jackie Robinson West 's manager , ousted the local district administrator and barred the program from tournament play . Reflecting on what he called `` a heartbreaking decision , '' Little League International President Stephen Keener said the Chicago team 's players can still be proud of what they accomplished last year . `` But it is unfortunate that the actions of adults have led to this outcome , '' Keener added . `` ... As painful as this is , we feel it a necessary decision to maintain the integrity of the Little League program . No team can be allowed to attempt to strengthen its team by putting players on their roster that live outside their boundaries . '' Brandon Green , a player on the Jackie Robinson West team , said the players were n't involved in anything that should cause the squad to be stripped of its title . `` We know that we 're champions , our parents know that we 're champions ... and Chicago knows we 're champions , '' he said at a news conference . Chicago Mayor Rahm Emanuel called Keener and the two spoke for 10 minutes , a spokeswoman for the mayor , Kelley Quinn , said . Emanuel told the Little League official that the players did n't deserve to be punished . The organization should have sanctioned the adults , he said . `` You have turned them into the perpetrators when they are the victims , '' Emanuel told him , according to his spokeswoman . `` You know what they have done for Chicago , and let 's face it , you know what they 've done for your tournament . '' Named for the icon who broke baseball 's color barrier and consisting entirely of African-Americans , the Jackie Robinson West squad proved that , despite talk to the contrary , baseball was not dead among inner-city youth . The Illinois team earned raves after knocking out Sports Illustrated cover girl Mo'ne Davis ' Philadelphia team and rolling to the U.S. championship contest . It entered that game as an underdog to Las Vegas , which had beaten every team it faced -- including crushing Chicago by a 13-2 score . The title game was a much more even affair . The two squads swapped leads before Chicago jumped ahead for good with a three-run fifth inning en route to a 7-5 win . In the World Series final the following day , Jackie Robinson West rallied late but could n't overcome the eventual champions from South Korea . That loss did n't halt the positive feelings about the team . Everyone from former Chicago White Sox great and baseball Hall of Famer Frank Thomas and longtime Obama adviser David Axelrod cheered their success . Mayor Rahm Emanuel credited `` their positive attitude and success on the field ( for rallying ) people from every neighborhood . '' The team was celebrated with a parade through their hometown and even a visit to the White House in November , where they met President Barack Obama , a Chicago resident . At the time of the Washington visit , local Little League officials were already investigating thanks to a tip from a neighboring district 's official and documentation . Little League International initially determined that all of Jackie Robinson West 's players were eligible . In the middle of December , though , `` Little League began to learn of multiple issues with boundary maps and operational process with multiple leagues in Illinois District 4 , '' the international organization said in a statement . Several more meetings followed , including one on January 31 when several issues came up , including that `` Jackie Robinson West Little League used a falsified boundary map for their 2014 tournament and that Jackie Robinson West Little League officials met with other leagues in District 4 to try to get the territory they wrongfully claimed was theirs for their 2014 tournament . '' `` During our review , it became clear that both Jackie Robinson West officials and ( the ) District Administrator ... signed documents to make players eligible who should not have been , '' Keener said . CNN 's Kevin Bohn contributed to this report .
He says he and teammates did nothing wrong and are still alive . Las Vegas team becomes the official national team after Little League 's ruling . Little League fires team 's manager , an official over infringement of player boundary maps .