| Philadelphia Keystones |
Philadelphia, Pennsylvania |
World Team Tennis |
professional |
defunct |
| Philadelphia Keystones of Philadelphia |
Philadelphia, Pennsylvania |
Union Association |
professional |
defunct |
| Pittsburgh Keystones |
Pittsburgh, Pennsylvania |
League of Colored Baseball Clubs |
professional |
defunct |
| Pittsburgh Keystones |
Pittsburgh, Pennsylvania |
Negro National League |
professional |
defunct |
| Pittsburgh Keystones |
Pittsburgh, Pennsylvania |
Western Pennsylvania Hockey League |
professional |
defunct |
| Reading Keystones |
Reading, Pennsylvania |
International League |
professional |
defunct |