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| First Name | Last Name | Given Name | Birth Year | Birth Month | Birth Day | Birth City | Birth Country | Height | Weight | Age | Bats | Throws |
| Walter | Johnson | Walter Perry | 1887 | 11 | 6 | Humboldt | USA | 73 | 200 | 59 | R | R |
| Year | Team | AB | HR | RBI | BA |
|---|---|---|---|---|---|
| 1907 | Washington Senators | 36 | 0 | 1 | 0.1111 |
| 1908 | Washington Senators | 79 | 0 | 5 | 0.1646 |
| 1909 | Washington Senators | 101 | 1 | 6 | 0.1287 |
| 1910 | Washington Senators | 137 | 2 | 12 | 0.1752 |
| 1911 | Washington Senators | 128 | 1 | 15 | 0.2344 |
| 1912 | Washington Senators | 144 | 2 | 20 | 0.2639 |
| 1913 | Washington Senators | 134 | 2 | 14 | 0.2612 |
| 1914 | Washington Senators | 136 | 3 | 16 | 0.2206 |
| 1915 | Washington Senators | 147 | 2 | 17 | 0.2313 |
| 1916 | Washington Senators | 142 | 1 | 7 | 0.2254 |
| 1917 | Washington Senators | 130 | 0 | 15 | 0.2538 |
| 1918 | Washington Senators | 150 | 1 | 18 | 0.2667 |
| 1919 | Washington Senators | 125 | 1 | 8 | 0.1920 |
| 1920 | Washington Senators | 64 | 1 | 7 | 0.2656 |
| 1921 | Washington Senators | 111 | 0 | 10 | 0.2703 |
| 1922 | Washington Senators | 108 | 1 | 15 | 0.2037 |
| 1923 | Washington Senators | 93 | 0 | 13 | 0.1935 |
| 1924 | Washington Senators | 113 | 1 | 14 | 0.2832 |
| 1925 | Washington Senators | 97 | 2 | 20 | 0.4330 |
| 1926 | Washington Senators | 103 | 1 | 12 | 0.1942 |
| 1927 | Washington Senators | 46 | 2 | 10 | 0.3478 |
| Year | Team | W | L | G | SHO |
|---|---|---|---|---|---|
| 1907 | Washington Senators | 5 | 9 | 14 | 2 |
| 1908 | Washington Senators | 14 | 14 | 36 | 6 |
| 1909 | Washington Senators | 13 | 25 | 40 | 4 |
| 1910 | Washington Senators | 25 | 17 | 45 | 8 |
| 1911 | Washington Senators | 25 | 13 | 40 | 6 |
| 1912 | Washington Senators | 33 | 12 | 50 | 7 |
| 1913 | Washington Senators | 36 | 7 | 48 | 11 |
| 1914 | Washington Senators | 28 | 18 | 51 | 9 |
| 1915 | Washington Senators | 27 | 13 | 47 | 7 |
| 1916 | Washington Senators | 25 | 20 | 48 | 3 |
| 1917 | Washington Senators | 23 | 16 | 47 | 8 |
| 1918 | Washington Senators | 23 | 13 | 39 | 8 |
| 1919 | Washington Senators | 20 | 14 | 39 | 7 |
| 1920 | Washington Senators | 8 | 10 | 21 | 4 |
| 1921 | Washington Senators | 17 | 14 | 35 | 1 |
| 1922 | Washington Senators | 15 | 16 | 41 | 4 |
| 1923 | Washington Senators | 17 | 12 | 42 | 3 |
| 1924 | Washington Senators | 23 | 7 | 38 | 6 |
| 1925 | Washington Senators | 20 | 7 | 30 | 3 |
| 1926 | Washington Senators | 15 | 16 | 33 | 2 |
| 1927 | Washington Senators | 5 | 6 | 18 | 1 |
| Year | Team | POS | E | DP | A |
|---|---|---|---|---|---|
| 1907 | Washington Senators | P | 3 | 1 | 20 |
| 1908 | Washington Senators | P | 4 | 3 | 56 |
| 1909 | Washington Senators | P | 7 | 2 | 73 |
| 1910 | Washington Senators | P | 6 | 3 | 90 |
| 1911 | Washington Senators | P | 4 | 8 | 95 |
| 1912 | Washington Senators | P | 4 | 4 | 93 |
| 1913 | Washington Senators | OF | 0 | 0 | 0 |
| 1913 | Washington Senators | P | 0 | 7 | 82 |
| 1914 | Washington Senators | OF | 0 | 0 | 0 |
| 1914 | Washington Senators | P | 5 | 6 | 102 |
| 1915 | Washington Senators | OF | 0 | 0 | 0 |
| 1915 | Washington Senators | P | 6 | 7 | 95 |
| 1916 | Washington Senators | P | 6 | 2 | 72 |
| 1917 | Washington Senators | P | 0 | 2 | 82 |
| 1918 | Washington Senators | OF | 1 | 0 | 1 |
| 1918 | Washington Senators | P | 1 | 4 | 70 |
| 1919 | Washington Senators | OF | 0 | 0 | 0 |
| 1919 | Washington Senators | P | 1 | 5 | 69 |
| 1920 | Washington Senators | P | 1 | 0 | 28 |
| 1921 | Washington Senators | P | 1 | 1 | 51 |
| 1922 | Washington Senators | P | 0 | 2 | 69 |
| 1923 | Washington Senators | P | 2 | 7 | 51 |
| 1924 | Washington Senators | P | 0 | 2 | 53 |
| 1925 | Washington Senators | P | 0 | 2 | 37 |
| 1926 | Washington Senators | P | 1 | 1 | 38 |
| 1927 | Washington Senators | P | 0 | 3 | 25 |