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Minnesota Twins Earned Run Average Leaders

Career totals with the Twins and the best single seasons in club history. Records run through the 2025 season.

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Walter Johnson holds the Twins career record with 2.17 earned run average. The single-season record is 1.14, by Walter Johnson in 1913.

ERA W SO SV WHIP IP K/9 BB/9 K/BB SHO CG GS G L BB W-L%

Rate records use the league's own minimums: a season needs the standard 1.0 inning per team game with the club, a career 1,000+ innings pitched with the club.

All-time Twins leaders

Career totals with the club
# Player With the club ERA G
1 Walter Johnson Walter Johnson 1907–1927 2.17 802
2 Doc Ayers Doc Ayers 1913–1919 2.64 227
3 Harry Harper Harry Harper 1913–1919 2.75 183
4 Tom Hughes Tom Hughes 1904–1913 3.02 285
5 Bob Groom Bob Groom 1909–1913 3.04 195
6 Jim Shaw Jim Shaw 1913–1921 3.07 287
7 Jim Perry Jim Perry 1963–1972 3.15 376
8 Johan Santana Johan Santana 2000–2007 3.22 251
9 Dutch Leonard Dutch Leonard 1938–1946 3.27 262
10 Bert Blyleven Bert Blyleven 1970–1988 3.28 348
11 Mickey Haefner Mickey Haefner 1943–1949 3.29 215
12 Jim Kaat Jim Kaat 1959–1973 3.34 484
12 Casey Patten Casey Patten 1901–1908 3.34 269
14 George Mogridge George Mogridge 1921–1925 3.35 145
15 Bob Porterfield Bob Porterfield 1951–1955 3.38 146
16 Dave Goltz Dave Goltz 1972–1979 3.48 247
17 Dave Boswell Dave Boswell 1964–1970 3.49 187
18 Firpo Marberry Firpo Marberry 1923–1936 3.59 470
19 Camilo Pascual Camilo Pascual 1954–1966 3.66 432
20 Tom Zachary Tom Zachary 1919–1928 3.78 273
21 Frank Viola Frank Viola 1982–1989 3.86 260
22 Early Wynn Early Wynn 1939–1948 3.94 191
23 General Crowder General Crowder 1926–1934 3.98 236
23 Bump Hadley Bump Hadley 1926–1935 3.98 233
23 Walt Masterson Walt Masterson 1939–1953 3.98 278

Single-season Twins records

Best seasons in club history
# Player Season ERA G
1 Walter Johnson Walter Johnson 1913 1.14 48
2 Walter Johnson Walter Johnson 1918 1.27 39
3 Walter Johnson Walter Johnson 1910 1.36 45
4 Walter Johnson Walter Johnson 1912 1.39 50
5 Walter Johnson Walter Johnson 1919 1.49 39
6 Walter Johnson Walter Johnson 1915 1.55 47
7 Walter Johnson Walter Johnson 1908 1.65 36
8 Bill Burns Bill Burns 1908 1.70 23
9 Walter Johnson Walter Johnson 1914 1.72 51
10 Walter Johnson Walter Johnson 1916 1.90 48
10 Walter Johnson Walter Johnson 1911 1.90 40
12 Dutch Leonard Dutch Leonard 1945 2.12 31
12 Roger Wolff Roger Wolff 1945 2.12 33
14 Joe Boehling Joe Boehling 1913 2.14 38
15 Doc Ayers Doc Ayers 1917 2.17 40
15 Casey Patten Casey Patten 1906 2.17 38
17 Harry Harper Harry Harper 1918 2.18 35
18 Doc Ayers Doc Ayers 1915 2.21 40
18 Tom Hughes Tom Hughes 1908 2.21 43
18 Walter Johnson Walter Johnson 1917 2.21 47
21 Walter Johnson Walter Johnson 1909 2.22 40
22 Bert Gallia Bert Gallia 1915 2.29 43
22 Mickey Haefner Mickey Haefner 1943 2.29 36
24 Johnny Niggeling Johnny Niggeling 1944 2.32 24
25 Cy Falkenberg Cy Falkenberg 1907 2.35 32