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BNN Stats: Single-Season Records Monday, June 22nd , 2111 Who holds the single season record in the Major League Baseball for ERA? Dutch Leonard, BOS, 0.961, 1914 Mordecai Brown, CHC, 1.038, 1906 Bob Gibson, STL, 1.123, 1968 Christy Mathewson, SF, 1.144, 1909 Walter Johnson, MIN, 1.145, 1913 |
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