| Franchise | City | Founded | Titles |
|---|---|---|---|
| Arizona Diamondbacks | Phoenix | 1998 | 1 |
| Athletics | — | 1968 | 4 |
| Atlanta Braves | — | 1871 | 3 |
| Baltimore Orioles | — | 1894 | 3 |
| Boston Red Sox | Boston | 1901 | 9 |
| Chicago Cubs | Chicago | 1870 | 2 |
| Chicago White Sox | Chicago Fire FC | 1894 | 3 |
| Cincinnati Reds | Cincinnati | 1881 | 5 |
| Cleveland Guardians | — | 1894 | 2 |
| Colorado Rockies | — | 1993 | — |
| Detroit Tigers | — | 1894 | 4 |
| Florida Marlins | Miami | — | 1 |
| Houston Astros | Houston | 1962 | 2 |
| Kansas City Royals | — | 1969 | 2 |
| Los Angeles Angels | — | 1960 | 1 |
| Los Angeles Dodgers | Los Angeles | 1884 | 8 |
| Miami Marlins | — | 1993 | 1 |
| Milwaukee Braves | Milwaukee | 1953 | — |
| Milwaukee Brewers | Milwaukee | 1969 | 1 |
| Minnesota Twins | — | 1901 | 2 |
| Montreal Expos | — | 1969 | — |
| New York Mets | — | 1962 | 2 |
| New York Yankees | The Bronx | 1903 | 27 |
| Oakland Athletics | Oakland | 1968 | — |
| Philadelphia Phillies | Philadelphia | 1883 | 2 |
| Pittsburgh Pirates | Pittsburgh | 1887 | 4 |
| San Diego Padres | San Diego | 1969 | — |
| San Francisco Giants | San Francisco | 1883 | 3 |
| Seattle Mariners | — | 1977 | — |
| St. Louis Cardinals | — | 1882 | 11 |
| Tampa Bay Rays | — | 1998 | — |
| Texas Rangers | — | 1972 | 1 |
| Toronto Blue Jays | Toronto | 1977 | 2 |
| Washington Nationals | — | 2005 | 1 |
| Worcester Worcesters | — | 1879 | — |