Sievers was one of only nine players to don the uniform of both the original and expansion Washington Senators teams, the others being Don Mincher, Camilo Pascual, Pedro Ramos, Johnny Schaive, Zoilo Versalles, Hal Woodeshick, Rudy Hernández, and Hector Maestri.
San Pedro Sula | San Pedro | Pedro Almodóvar | San Pedro de Macorís | Pedro Infante | Pedro II of Brazil | Pedro Martínez | Sergio Ramos | Pedro Vargas | San Pedro, Los Angeles | Pedro Rosselló | San Pedro Town | Fidel V. Ramos | Colégio Pedro II | Pedro Rodríguez | Pedro Fernández de Castro | Pedro Damián | Pedro Álvares Cabral | José Ramos-Horta | San Pedro de Atacama | Point Pedro | Pedro Juan Caballero, Paraguay | Pedro Juan Caballero | Pedro Cieza de León | Pedro Bell | Dom Pedro | Colégio Pedro II (Rio de Janeiro) | São Pedro | Pedro Torres | Pedro Rodríguez (racing driver) |