| Basket Torino | — | Turin | 2019 | Palazzetto dello Sport Gianni Asti |
| Basketball Valdarno | — | — | — | — |
| Basketball Vigarano | — | Vigarano Mainarda | — | — |
| BC Castelnuovo Scrivia | — | Castelnuovo Scrivia | 1986 | — |
| BC Roma SPQR | Serie A | — | 2026 | Palazzetto dello Sport |
| Bears Mestre | — | Mestre | — | — |
| Bella Esperanza | Copa Perú | — | 1915 | — |
| Benedetto XIV Cento | — | San Lazzaro di Savena | 2011 | — |
| Bergamo Basket 2014 | — | Bergamo | 1970 | — |
| Blu Basket 1971 | — | Treviglio | 1971 | — |
| Bonfiglioli Ferrara Basket | — | Ferrara | — | — |
| 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 |
| Brixia Basket | — | — | — | — |
| Brooklyn Americans | — | — | — | — |
| Brooklyn Dodgers | National League, American Association | — | — | — |
| Brooklyn Nets | National Basketball Association | Brooklyn | 1967 | Island Garden, Long Island Arena, Teaneck Armory, Prudential Center, Nassau Veterans Memorial Coliseum, Meadowlands Arena, 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 Perú | — | — | Estadio Max Augustín |
| C.D. Universidad Nacional de Ucayali | Copa Perú | — | 1979 | Estadio Aliardo Soria Pérez |
| C.D. Universidad Privada Antenor Orrego | Copa Perú | — | 1995 | Estadio Mansiche |
| Calgary Flames | — | — | 1980 | Stampede Corral, Scotiabank Saddledome |
| California Golden Seals | — | — | 1967 | Oakland Arena |
| Campetto Stamura 1920 | — | — | — | — |
| Carlos A. Mannucci | Copa Perú | — | 1959 | Estadio Mansiche |
| Carlos Tenaud Nº 2 | — | — | — | Estadio Nacional del Perú (1897) |
| Carolina Hurricanes | — | — | 1972 | Greensboro Coliseum Complex, Lenovo Center |
| Carolina Panthers | National Football League | — | 26 October 1993 | Bank of America Stadium |
| CD Universidad César Vallejo | Peruvian Primera División | — | 1996 | Estadio Mansiche |
| CD Universidad San Marcos | Peruvian Segunda División | — | 2001 | Estadio Universidad San Marcos |
| Celana Basket Bergamo | — | Bergamo | 1948 | PalaNorda |
| Centro Iqueño | Peruvian Primera División | — | 12 October 1935 | National Stadium of Peru |
| Centro Pallacanestro Rende | — | — | — | — |
| Centro Sportivo Aeronautica Militare | — | Bracciano | 1964 | — |
| Cestistica Azzurra Orvieto | — | Orvieto | 1984 | — |
| Cestistica Civitavecchia | — | — | — | — |
| Cestistica San Severo | — | San Severo | 1966 | — |
| CF Montréal | Major League Soccer | Montreal | 2010 | Saputo Stadium |
| Chacarita Versalles | Copa Perú | — | 1942 | Estadio Max Augustín |
| Chanchamayo FC | Copa Perú | — | 2002 | — |
| Charlotte FC | Major League Soccer | Charlotte | 17 December 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, Gies 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 |