American soccer writing, history & data.
| Club | Location | Years |
|---|---|---|
| R. J. Leacock Supply Co. | - | 1904–1905 |
| Racine City | - | 1913–1915 |
| Racine S.C. | - | 1952–1996 |
| Raleigh Capital Express | - | 1993–2000 |
| Raleigh Wings | - | 1998–2000 |
| Rangers | - | 1905–1907 |
| Rangers F.C. | - | 1911–1921 |
| Rawlings | - | 1903–1905 |
| Reading United A.C. | - | 1996 |
| Real Santa Barbara S.C. | - | 1989–1990 |
| Red Bull New York | - | 1996 |
| Red Star F.C. | - | 1894–1894 |
| Reisterstown | - | 1948–1949 |
| Reliance | - | 1921–1922 |
| Rhode Island Rays | - | 1994–2004 |
| Rhode Island Stingrays | - | 1994–2009 |
| Richmond Kickers | - | 1993 |
| Riverdale | - | 1917–1918 |
| Roanoke RiverDawgs | - | 1995–1996 |
| Roanoke Wrath | - | 1997–2000 |
| Robert Burns F.C. | - | 1906–1907 |
| Robins Dry Dock & Repair Co. F.C. | - | 1918–1921 |
| Rochester Flash | - | 1981–1984 |
| Rochester Lancers | - | 1967–1980 |
| Rochester New York FC | - | 1996 |
| Rochester Ravens | - | 1996–2012 |
| Rockford Raptors FC | - | 1994 |
| Roma Sport Club | - | 1955 |
| Root's Restaurant | - | 1951–1952 |
| Ruggiero's Cafe S.C. | - | 1943–1946 |
| Rustless Iron and Steel Corp. | - | 1942–1943 |