| Basket Recanati | — | Recanati | 1982 | — |
| Basket Team Crema | — | — | — | — |
| Basketball Valdarno | — | — | — | — |
| BC Roma SPQR | Liga Italiana de Basquetebol | — | 2026 | Palazzetto dello Sport |
| Bella Esperanza | Copa Peru | — | 1915 | — |
| Benedetto XIV Cento | — | San Lazzaro di Savena | 2011 | — |
| Bergamo Basket 2014 | — | Bérgamo | 1970 | — |
| Biancoblù Basket Bologna | — | Bolonha | 2011 | PalaDozza |
| Blu Basket 1971 | — | Treviglio | 1971 | — |
| Boston Braves | — | — | 1871 | — |
| Boston Bruins | — | — | 1924 | Matthews Arena, TD Garden, Boston Garden |
| Boston Celtics | National Basketball Association | Boston | 1946 | Matthews Arena, Boston Garden, PeoplesBank Arena, TD Garden |
| Boston Red Sox | Major League Baseball | Boston | 1901 | Huntington Avenue Grounds, Fenway Park |
| Brooklyn Americans | — | — | — | — |
| Brooklyn Dodgers | National League, Associação Americana | — | — | — |
| Brooklyn Nets | National Basketball Association | Brooklyn | 1967 | Island Garden, Long Island Arena, Teaneck Armory, Prudential Center, Nassau Veterans Memorial Coliseum, Izod Center, Jersey Mike's Arena, Barclays Center |
| Buffalo Bills | National Football League | Orchard Park | 1960 | Ralph Wilson Stadium, War Memorial Stadium |
| Buffalo Sabres | — | — | 1970 | Buffalo Memorial Auditorium, KeyBank Center |
| C.D. Universidad Nacional de la Amazonía Peruana | Copa Peru | — | — | Estadio Max Augustín |
| C.D. Universidad Nacional de Ucayali | Copa Peru | — | 1979 | Estadio Aliardo Soria Pérez |
| C.D. Universidad Privada Antenor Orrego | Copa Peru | — | 1995 | Estádio Mansiche |
| Calgary Flames | — | — | 1980 | Stampede Corral, Scotiabank Saddledome |
| California Golden Seals | — | — | 1967 | Oakland Arena |
| Campetto Stamura 1920 | — | — | — | — |
| Canadiens de Montréal | — | — | 1909 | Centre Bell, Jubilee Arena, Montreal Forum, Montreal Arena, Mount Royal Arena |
| Carlos Tenaud Nº 2 | — | — | — | Estadio Nacional del Perú (1897) |
| Carolina Hurricanes | — | — | 1972 | Greensboro Coliseum, Lenovo Center |
| Carolina Panthers | National Football League | — | 26 de outubro de 1993 | Bank of America Stadium |
| CD Universidad San Marcos | Segunda División (Campeonato Peruano de Futebol) | — | 2001 | Estádio Universidad San Marcos |
| Celana Basket Bergamo | — | Bérgamo | 1948 | PalaNorda |
| Centro Iqueño | Campeonato Peruano de Futebol | — | 12 de outubro de 1935 | Estádio Nacional do Peru |
| Centro Pallacanestro Rende | — | — | — | — |
| Centro Sportivo Aeronautica Militare | — | Bracciano | 1964 | — |
| Cestistica Azzurra Orvieto | — | Orvieto | 1984 | — |
| Cestistica Civitavecchia | — | — | — | — |
| Cestistica Ragusa | — | — | — | — |
| Cestistica San Severo | — | San Severo | 1966 | — |
| CF Montréal | Major League Soccer | Montreal | 2010 | Estádio Saputo |
| Chacarita Versalles | Copa Peru | — | 1942 | Estadio Max Augustín |
| Chanchamayo FC | Copa Peru | — | 2002 | — |
| Charlotte Football Club | Major League Soccer | Charlotte | 17 de dezembro de 2019 | Bank of America Stadium |
| Charlotte Hornets | National Basketball Association | Charlotte | 1988 | Spectrum Center, Charlotte Coliseum |
| Chicago Bears | National Football League | — | 1919 | Soldier Field, Staley Field, Memorial Stadium, Wrigley Field |
| Chicago Blackhawks | — | — | 1926 | Chicago Stadium, Chicago Coliseum, United Center |
| Chicago Bulls | National Basketball Association | Chicago | 1966 | United Center, Chicago Stadium, International Amphitheatre |
| Chicago Cubs | Major League Baseball | Chicago | 1870 | Wrigley Field |
| Chicago Fire Football Club | Major League Soccer | Chicago | 8 de outubro de 1997 | Soldier Field, Benedetti–Wehrli Stadium, Toyota Park |
| Chicago Stags | Basketball Association of America | Chicago | 1946 | Chicago Stadium |