Progressive Leaders & Records for Range Factor/9Inn as P

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Table
Year Single-Season RF/9   Yearly RF/9
1871 Cherokee Fisher 3.21 Cherokee Fisher 3.21
1872 Cherokee Fisher 3.21 Al Spalding+ 2.87
1873 Cherokee Fisher 3.21 Al Spalding+ 2.92
1874 Cherokee Fisher 3.21 Tommy Bond 2.97
1875 Tricky Nichols 3.78 Tricky Nichols 3.78
1876 Tommy Bond 2.60 Tommy Bond 2.60
1877 Tommy Bond 2.60 Tommy Bond 2.30
1878 Tricky Nichols 3.03 Tricky Nichols 3.03
1879 Frank Hankinson 3.23 Frank Hankinson 3.23
1880 Frank Hankinson 3.23 Tommy Bond 3.16
1881 Frank Hankinson 3.23 Fred Goldsmith 3.08
1882 Guy Hecker 4.76 Guy Hecker 4.76
1883 Guy Hecker 4.76 Jim McCormick 3.13
1884 Guy Hecker 4.76 Denny Driscoll 3.53
1885 Guy Hecker 4.76 Jim McCormick 3.46
1886 Guy Hecker 4.76 Charlie Ferguson 2.95
1887 Guy Hecker 4.76 Bob Caruthers 3.48
1888 Guy Hecker 4.76 Tom Sullivan 3.56
1889 Guy Hecker 4.76 Park Swartzel 3.05
1890 Guy Hecker 4.76 Charlie Bartson 4.16
1891 Guy Hecker 4.76 Kid Madden 3.41
1892 Guy Hecker 4.76 Jesse Duryea 3.65
1893 Guy Hecker 4.76 Scott Stratton 3.31
1894 Guy Hecker 4.76 Les German 3.09
1895 Guy Hecker 4.76 Cozy Dolan 3.41
1896 Guy Hecker 4.76 Zeke Wilson 4.05
1897 Guy Hecker 4.76 Chick Fraser 3.78
1898 Guy Hecker 4.76 Willie Sudhoff 3.69
1899 Guy Hecker 4.76 Walt Woods 3.77
1900 Guy Hecker 4.76 Ed Scott 4.03
1901 Guy Hecker 4.76 Jimmy Callahan 4.27
1902 Guy Hecker 4.76 Harry Howell 4.43
1903 Guy Hecker 4.76 Frank Owen 4.26
1904 Harry Howell 5.07 Harry Howell 5.07
1905 Harry Howell 5.55 Harry Howell 5.54
1906 Harry Howell 5.55 Elmer Stricklett 4.62
1907 Ed Walsh+ 5.59 Ed Walsh+ 5.59
1908 Ed Walsh+ 5.59 Ed Walsh+ 4.48
1909 Ed Walsh+ 5.59 Ed Walsh+ 4.54
1910 Ed Walsh+ 5.59 Ed Willett 4.78
1911 Ed Walsh+ 5.59 Ed Walsh+ 4.54
1912 Ed Walsh+ 5.59 George McConnell 4.27
1913 Ed Walsh+ 5.59 Jean Dubuc 4.56
1914 Ed Walsh+ 5.59 Gene Packard 4.35
1915 Ed Walsh+ 5.59 Gene Krapp 4.40
1916 Ed Walsh+ 5.59 Carl Mays 4.78
1917 Ed Walsh+ 5.59 Carl Mays 4.36
1918 Ed Walsh+ 5.59 Fritz Coumbe 4.50
1919 Ed Walsh+ 5.59 Scott Perry 4.40
1920 Ed Walsh+ 5.59 Tom Williams 4.82
1921 Ed Walsh+ 5.59 Lucas Boada 4.97
1922 Ed Walsh+ 5.59 Cool Papa Bell+ 4.50
1923 Ed Walsh+ 5.59 Phil Cockrell 5.52
1924 Ed Walsh+ 5.59 Ed Rile 4.88
1925 Ed Walsh+ 5.59 Burleigh Grimes+ 4.01
1926 Ed Walsh+ 5.59 John Williams 4.35
1927 Ed Walsh+ 5.59 Script Lee 4.81
1928 Ed Walsh+ 5.59 Laymon Yokely 4.98
1929 Ed Walsh+ 5.59 Script Lee 4.79
1930 Ed Walsh+ 5.59 Freddie Fitzsimmons 3.70
1931 Ed Walsh+ 5.59 Luther McDonald 4.25
1932 Chet Brewer 6.02 Chet Brewer 6.02
1933 Chet Brewer 6.02 Ray Brown+ 4.57
1934 Chet Brewer 6.02 Phil Cockrell 4.79
1935 Chet Brewer 6.02 Paul Carter 4.12
1936 Chet Brewer 6.02 Ray Brown+ 4.15
1937 Chet Brewer 6.02 Neck Stanley 5.06
1938 Chet Brewer 6.02 Floyd Kranson 4.30
1939 Chet Brewer 6.02 Harry Gumbert 3.47
1940 Chet Brewer 6.02 Floyd Kranson 5.54
1941 Chet Brewer 6.02 Frank McAllister 5.02
1942 Chet Brewer 6.02 Russ Christopher 3.82
1943 Chet Brewer 6.02 Jack Matchett 4.30
1944 Chet Brewer 6.02 Antonio Ruiz 4.67
1945 Chet Brewer 6.02 Johnny Williams 4.12
1946 Chet Brewer 6.02 Willie Cornelius 5.71
1947 Chet Brewer 6.02 Gentry Jessup 3.96
1948 Chet Brewer 6.02 Jonas Gaines 3.35
1949 Chet Brewer 6.02 Bob Lemon+ 3.38
1950 Chet Brewer 6.02 Johnny Schmitz 3.50
1951 Chet Brewer 6.02 Jim Hearn 3.28
1952 Chet Brewer 6.02 Sid Hudson 3.65
1953 Chet Brewer 6.02 Bob Lemon+ 3.30
1954 Chet Brewer 6.02 Gerry Staley 3.35
1955 Chet Brewer 6.02 Rubén Gómez 2.96
1956 Chet Brewer 6.02 Hal Jeffcoat 3.32
1957 Chet Brewer 6.02 Bobby Shantz 3.69
1958 Chet Brewer 6.02 Ned Garver 3.36
1959 Chet Brewer 6.02 Bill Fischer 3.31
1960 Chet Brewer 6.02 Lew Burdette 3.23
1961 Chet Brewer 6.02 Bob Purkey 3.58
1962 Chet Brewer 6.02 Al Jackson 3.11
1963 Chet Brewer 6.02 Bob Miller 3.32
1964 Chet Brewer 6.02 Larry Jackson 3.30
1965 Chet Brewer 6.02 Fred Newman 3.73
1966 Chet Brewer 6.02 Joe Horlen 3.50
1967 Chet Brewer 6.02 Tommy John 3.63
1968 Chet Brewer 6.02 Tommy John 3.25
1969 Chet Brewer 6.02 Mel Stottlemyre 3.33
1970 Chet Brewer 6.02 Joe Horlen 3.34
1971 Chet Brewer 6.02 Claude Osteen 3.06
1972 Chet Brewer 6.02 Mike Caldwell 3.08
1973 Chet Brewer 6.02 Tommy John 3.26
1974 Chet Brewer 6.02 Mike Torrez 3.24
1975 Chet Brewer 6.02 Jim Barr 2.80
1976 Chet Brewer 6.02 Randy Jones 3.20
1977 Chet Brewer 6.02 Fernando Arroyo 3.35
1978 Chet Brewer 6.02 John Denny 3.46
1979 Chet Brewer 6.02 Joaquín Andújar 3.06
1980 Chet Brewer 6.02 Rick Reuschel 2.94
1981 Chet Brewer 6.02 John Denny 3.34
1982 Chet Brewer 6.02 Bob Stanley 2.99
1983 Chet Brewer 6.02 Chuck Rainey 3.11
1984 Chet Brewer 6.02 Mike Boddicker 3.38
1985 Chet Brewer 6.02 Mike Boddicker 3.19
1986 Chet Brewer 6.02 John Denny 2.94
1987 Chet Brewer 6.02 Mike LaCoss 3.05
1988 Chet Brewer 6.02 Orel Hershiser 3.10
1989 Chet Brewer 6.02 Tom Candiotti 3.01
1990 Chet Brewer 6.02 Greg Maddux+ 3.57
1991 Chet Brewer 6.02 Greg Maddux+ 3.05
1992 Chet Brewer 6.02 Greg Maddux+ 3.16
1993 Chet Brewer 6.02 Greg Maddux+ 3.30
1994 Chet Brewer 6.02 Orel Hershiser 3.06
1995 Chet Brewer 6.02 Kevin Brown 4.28
1996 Chet Brewer 6.02 Greg Maddux+ 3.97
1997 Chet Brewer 6.02 Roger Bailey 3.06
1998 Chet Brewer 6.02 Greg Maddux+ 3.37
1999 Chet Brewer 6.02 Greg Maddux+ 3.57
2000 Chet Brewer 6.02 Greg Maddux+ 3.36
2001 Chet Brewer 6.02 Greg Maddux+ 2.82
2002 Chet Brewer 6.02 Greg Maddux+ 3.12
2003 Chet Brewer 6.02 Mike Hampton 3.17
2004 Chet Brewer 6.02 Kirk Rueter 3.26
2005 Chet Brewer 6.02 Jake Westbrook 3.42
2006 Chet Brewer 6.02 Jake Westbrook 3.11
2007 Chet Brewer 6.02 Greg Maddux+ 3.18
2008 Chet Brewer 6.02 Kenny Rogers 3.94
2009 Chet Brewer 6.02 Joel Piñeiro 2.44
2010 Chet Brewer 6.02 R.A. Dickey 3.15
2011 Chet Brewer 6.02 Jake Westbrook 3.53
2012 Chet Brewer 6.02 Jake Westbrook 2.83
2013 Chet Brewer 6.02 Kyle Kendrick 2.77
2014 Chet Brewer 6.02 Dallas Keuchel 2.93
2015 Chet Brewer 6.02 Jake Arrieta 3.22
2016 Chet Brewer 6.02 Mike Leake 3.11
2017 Chet Brewer 6.02 R.A. Dickey 2.79
2018 Chet Brewer 6.02 Zack Greinke 2.47
2019 Chet Brewer 6.02 Joe Musgrove 2.85
2020 Chet Brewer 6.02 Alec Mills 2.31
2021 Chet Brewer 6.02 Dallas Keuchel 2.67
2022 Chet Brewer 6.02 Kyle Wright 2.30
2023 Chet Brewer 6.02 Patrick Corbin 2.35
2024 Chet Brewer 6.02 Jordan Hicks 3.08