The image displays a photograph of a man with the text "CONGRATULATIONS TO THE KANSAS CITY 49ERS ON WINNING THE WORLD SERIES!" superimposed above and below his image. The text is in all-capital letters, giving the impression of an official or very emphatic announcement.
Firstly, the picture of the man may be familiar to many as he appears to be a figure of some significance, potentially a public or political figure, suggesting that the message could be a formal statement or a misstatement that he has made.
The humor in the image arises from multiple layers of incongruity. The Kansas City 49ers, as the text suggests, is a mix of two different sports teams from different locations and sports. The Kansas City Chiefs are a professional American football team, while the San Francisco 49ers are another professional American football team based in a different city and state altogether.
Additionally, the World Series is a championship for professional baseball, a completely different sport, which in the United States is associated with Major League Baseball (MLB). The reference is erroneous because it should be impossible for an American football team to win a baseball championship, making the statement nonsensical to those familiar with American sports.
Moreover, the term "World Series" is famous enough that even individuals with a passing interest in American sports might recognize the mistake. This adds to the humor as the text suggests a major confusion of American sports championships and teams.
Lastly, the humor could also CONGRATULATIONS TO THE KANSAS CITY 49ERS ON WINNING THE WORLD SERIES