| Seattle Metropolitans | Pacific Coast Hockey League | Seattle | 1915 | — |
| Seattle Seahawks | National Football League | — | 1976 | Kingdome, Estadio Husky, Lumen Field |
| Seattle Sounders FC | Major League Soccer | Seattle | 2009 | Lumen Field |
| Seattle SuperSonics | — | Washington | 1967 | Kingdome, Climate Pledge Arena, Tacoma Dome |
| Sebastiani Basket Club Rieti | — | — | — | — |
| Senati FBC | Copa Perú | — | — | Estadio Mariano Melgar |
| Sheboygan Redskins | National Basketball Association | Sheboygan | 1938 | Playdium, Sheboygan Municipal Auditorium and Armory |
| Silver Basket Porto Torres | — | Porto Torres | — | — |
| Sisv Viterbo | — | Viterbo | — | — |
| Società Cestistica Mazzini | — | Bolonia | — | — |
| Società Ginnastica Roma | — | — | — | — |
| Società Ginnastica Triestina | — | Trieste | 1930 | — |
| Sport Boys Association | Torneo Descentralizado | — | 1927 | Estadio Miguel Grau |
| Sport Chorrillos | Copa Perú | — | — | Estadio Campeones del 36 |
| Sport Club Alcamo | — | Alcamo | — | — |
| Sport Huamanga | Copa Perú | — | 2002 | Estadio Ciudad de Cumaná |
| Sport José Gálvez | — | — | 1902 | Antiguo Estadio Nacional del Perú |
| Sport Juan Bielovucic | — | — | — | Antiguo Estadio Nacional del Perú |
| Sport Saenz Peña | — | — | 1906 | Estadio Telmo Carbajo |
| Sport Vallejo | Copa Perú | — | octubre 2002 | Estadio Mansiche |
| Sporting Bellavista | — | — | 1912 | Antiguo Estadio Nacional del Perú |
| Sporting Club Gira | — | Bolonia, Ozzano dell'Emilia | 1945 | — |
| Sporting Kansas City | Major League Soccer | Kansas City | 1995 | Sporting Park, CommunityAmerica Ballpark, Arrowhead Stadium |
| Sportivo Melgar | — | — | 14 de julio de 1925 | Antiguo Estadio Nacional del Perú |
| Sportivo Tarapacá Ferrocarril | — | — | 15 de octubre de 1911 | Estadio Nacional del Perú |
| St. Louis City SC | Major League Soccer | San Luis | 20 de agosto de 2019 | Energizer Park |
| St. Louis Hawks | National Basketball Association | — | — | — |
| Starlight Valmadrera | — | — | — | — |
| Stella Azzurra Roma | — | Roma | 1938 | — |
| Sutor Basket Montegranaro | — | Montegranaro | 1947 | Banca Marche Palace |
| Tampa Bay Buccaneers | National Football League | — | 24 de abril de 1974 | Raymond James Stadium |
| Tampa Bay Lightning | — | — | 1992 | Expo Hall, Tropicana Field, Benchmark International Arena |
| Tampa Bay Rays | Grandes Ligas de Béisbol | — | 1998 | Tropicana Field |
| Tennessee Titans | National Football League | Nashville | 1960 | Nissan Stadium |
| Texas Rangers | Grandes Ligas de Béisbol | — | 1972 | Rangers Ballpark in Arlington |
| Thunder Basket Matelica - Fabriano | — | — | — | — |
| Toronto Arenas | — | — | 1917 | Mutual Street Arena |
| Toronto Blue Jays | Grandes Ligas de Béisbol | Toronto | 1977 | Rogers Centre |
| Toronto FC | Major League Soccer | Toronto | 2006 | BMO Field |
| Toronto Maple Leafs | — | — | 22 de noviembre de 1917 | Scotiabank Arena, Mutual Street Arena, Maple Leaf Gardens |
| Toronto Raptors | National Basketball Association | Toronto | 1995 | Rogers Centre, Scotiabank Arena |
| Toronto St. Patricks | — | — | — | Mutual Street Arena |
| Total Chalaco Fútbol Club | Copa Perú | — | 2003 | Estadio Segundo Aranda Torres |
| U.C.C. | — | Casalpusterlengo | 1977 | PalaBanca |
| U.S. Sangiorgese | — | — | — | — |
| Umana Venezia | — | — | 1925 | — |
| Unione Cestistica Piacentina | — | Piacenza | 2003 | — |
| Unione Sportiva Basket Recanati | — | Recanati | 1982 | — |