Progressive Leaders & Records for Range Factor/9Inn as 1B

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Table
Year Single-Season RF/9   Yearly RF/9
1871 Denny Mack 12.22 Denny Mack 12.22
1872 Tim Murnane 12.76 Tim Murnane 12.76
1873 Tim Murnane 12.76 Herman Dehlman 12.74
1874 Herman Dehlman 13.48 Herman Dehlman 13.48
1875 Herman Dehlman 13.48 Herman Dehlman 13.05
1876 Joe Gerhardt 12.07 Joe Gerhardt 12.07
1877 Joe Gerhardt 12.07 Joe Start 11.81
1878 Tim Murnane 12.28 Tim Murnane 12.28
1879 Cap Anson+ 12.48 Cap Anson+ 12.48
1880 Cap Anson+ 12.48 Joe Start 11.66
1881 Cap Anson+ 12.48 Cap Anson+ 11.45
1882 Cap Anson+ 12.48 Chappy Lane 11.80
1883 Cap Anson+ 12.48 Charlie Comiskey+ 11.54
1884 Cap Anson+ 12.48 Jim Field 11.55
1885 Cap Anson+ 12.48 Alex McKinnon 11.67
1886 Cap Anson+ 12.48 Mox McQuery 11.48
1887 Cap Anson+ 12.48 Billy O'Brien 11.81
1888 Cap Anson+ 12.48 Bill Phillips 12.17
1889 Cap Anson+ 12.48 Dan Stearns 11.15
1890 Cap Anson+ 12.48 Roger Connor+ 11.67
1891 Cap Anson+ 12.48 John Reilly 11.78
1892 Cap Anson+ 12.48 Lew Whistler 11.50
1893 Cap Anson+ 12.48 Jake Virtue 11.37
1894 Cap Anson+ 12.48 Jack Doyle 10.77
1895 Cap Anson+ 12.48 George LaChance 11.20
1896 Cap Anson+ 12.48 Patsy Tebeau 11.94
1897 Cap Anson+ 12.48 Perry Werden 11.55
1898 Cap Anson+ 12.48 Tommy Tucker 11.76
1899 Cap Anson+ 12.48 Bill Everitt 11.98
1900 Cap Anson+ 12.48 John Ganzel 11.53
1901 Cap Anson+ 12.48 Harry Davis 11.82
1902 Cap Anson+ 12.48 Charlie Hickman 11.65
1903 Cap Anson+ 12.48 John Anderson 11.70
1904 Cap Anson+ 12.48 Tom Jones 11.68
1905 Cap Anson+ 12.48 Tom Jones 12.08
1906 Cap Anson+ 12.48 Jiggs Donahue 11.91
1907 Jiggs Donahue 12.75 Jiggs Donahue 12.75
1908 Jiggs Donahue 12.75 Jiggs Donahue 12.71
1909 Frank Isbell 12.84 Frank Isbell 12.84
1910 Frank Isbell 12.84 Ed Konetchy 11.50
1911 Frank Isbell 12.84 Ed Konetchy 11.09
1912 Frank Isbell 12.84 Stuffy McInnis 10.84
1913 Frank Isbell 12.84 Del Gainer 12.04
1914 Frank Isbell 12.84 George Burns 12.28
1915 Frank Isbell 12.84 George Stovall 12.03
1916 Frank Isbell 12.84 Vic Saier 11.79
1917 Frank Isbell 12.84 Gene Paulette 12.79
1918 Frank Isbell 12.84 Gene Paulette 12.31
1919 Frank Isbell 12.84 Hal Chase 11.92
1920 Frank Isbell 12.84 Tullie McAdoo 11.88
1921 Frank Isbell 12.84 Ben Taylor+ 12.04
1922 Frank Isbell 12.84 Lemuel Hawkins 12.33
1923 Frank Isbell 12.84 Edgar Wesley 12.47
1924 Frank Isbell 12.84 José Pérez 12.35
1925 Frank Isbell 12.84 Willie Bobo 12.26
1926 Frank Isbell 12.84 Lemuel Hawkins 12.68
1927 Frank Isbell 12.84 Willie Bobo 12.34
1928 Frank Isbell 12.84 Ed Rile 12.22
1929 Frank Isbell 12.84 Ed Rile 11.78
1930 Frank Isbell 12.84 Ed Rile 11.88
1931 Frank Isbell 12.84 Bill Sweeney 11.53
1932 Frank Isbell 12.84 Earl Gurley 11.49
1933 Frank Isbell 12.84 Joe Scott 11.83
1934 Frank Isbell 12.84 George McAllister 11.42
1935 Frank Isbell 12.84 Jim West 11.45
1936 Frank Isbell 12.84 Sam Leslie 11.27
1937 Frank Isbell 12.84 Jim West 11.91
1938 Frank Isbell 12.84 Luther Gilyard 12.02
1939 Frank Isbell 12.84 Ed Young 11.53
1940 Frank Isbell 12.84 Buck Leonard+ 11.81
1941 Frank Isbell 12.84 Jim West 11.59
1942 Frank Isbell 12.84 Archie Ware 11.60
1943 Frank Isbell 12.84 Archie Ware 12.35
1944 Frank Isbell 12.84 Buck Leonard+ 11.69
1945 Frank Isbell 12.84 Piper Davis 11.52
1946 Frank Isbell 12.84 Buck O'Neil+ 11.21
1947 Frank Isbell 12.84 Lyman Bostock 11.03
1948 Frank Isbell 12.84 Buck Leonard+ 11.04
1949 Frank Isbell 12.84 Mickey Vernon 10.63
1950 Frank Isbell 12.84 Don Kolloway 10.32
1951 Frank Isbell 12.84 Walt Dropo 10.50
1952 Frank Isbell 12.84 Tony Bartirome 10.51
1953 Frank Isbell 12.84 Steve Bilko 10.56
1954 Frank Isbell 12.84 Joe Cunningham 10.57
1955 Frank Isbell 12.84 Gil Hodges+ 10.25
1956 Frank Isbell 12.84 Joe Adcock 10.42
1957 Frank Isbell 12.84 Whitey Lockman 10.94
1958 Frank Isbell 12.84 Dick Gernert 10.62
1959 Frank Isbell 12.84 Joe Adcock 10.60
1960 Frank Isbell 12.84 Roy Sievers 10.23
1961 Frank Isbell 12.84 Joe Adcock 10.77
1962 Frank Isbell 12.84 Ernie Banks+ 10.78
1963 Frank Isbell 12.84 Ernie Banks+ 10.72
1964 Frank Isbell 12.84 Ernie Banks+ 11.36
1965 Frank Isbell 12.84 Ernie Banks+ 11.13
1966 Frank Isbell 12.84 Tommy McCraw 10.95
1967 Frank Isbell 12.84 Tommy McCraw 10.82
1968 Frank Isbell 12.84 Donn Clendenon 11.12
1969 Frank Isbell 12.84 Gail Hopkins 10.73
1970 Frank Isbell 12.84 Bob Robertson 10.39
1971 Frank Isbell 12.84 Joe Pepitone 10.80
1972 Frank Isbell 12.84 Felipe Alou 10.64
1973 Frank Isbell 12.84 John Mayberry 10.74
1974 Frank Isbell 12.84 Mike Jorgensen 11.21
1975 Frank Isbell 12.84 Jim Spencer 10.68
1976 Frank Isbell 12.84 Jason Thompson 10.78
1977 Frank Isbell 12.84 Bill Buckner 10.86
1978 Frank Isbell 12.84 Bill Buckner 11.59
1979 Frank Isbell 12.84 Chris Chambliss 10.71
1980 Frank Isbell 12.84 Ron Jackson 11.48
1981 Frank Isbell 12.84 Keith Hernandez 11.74
1982 Frank Isbell 12.84 Keith Hernandez 11.31
1983 Frank Isbell 12.84 Bill Buckner 11.35
1984 Frank Isbell 12.84 David Green 10.93
1985 Frank Isbell 12.84 Bob Horner 11.46
1986 Frank Isbell 12.84 Bob Horner 11.22
1987 Frank Isbell 12.84 Gerald Perry 10.96
1988 Frank Isbell 12.84 Will Clark 10.49
1989 Frank Isbell 12.84 Pedro Guerrero 10.60
1990 Frank Isbell 12.84 Will Clark 10.60
1991 Frank Isbell 12.84 Mark Grace 10.81
1992 Frank Isbell 12.84 Mark Grace 10.95
1993 Frank Isbell 12.84 Don Mattingly 10.80
1994 Frank Isbell 12.84 Brian Hunter 10.84
1995 Frank Isbell 12.84 Andrés Galarraga 10.39
1996 Frank Isbell 12.84 Andrés Galarraga 10.73
1997 Frank Isbell 12.84 Andrés Galarraga 10.69
1998 Frank Isbell 12.84 Rafael Palmeiro 10.18
1999 Frank Isbell 12.84 Lee Stevens 10.07
2000 Frank Isbell 12.84 Jason Giambi 10.32
2001 Frank Isbell 12.84 Kevin Young 10.21
2002 Frank Isbell 12.84 Kevin Young 10.87
2003 Frank Isbell 12.84 Robert Fick 10.38
2004 Frank Isbell 12.84 Albert Pujols 10.57
2005 Frank Isbell 12.84 Albert Pujols 11.22
2006 Frank Isbell 12.84 Lyle Overbay 10.58
2007 Frank Isbell 12.84 Lyle Overbay 10.75
2008 Frank Isbell 12.84 Todd Helton+ 11.16
2009 Frank Isbell 12.84 Albert Pujols 10.84
2010 Frank Isbell 12.84 Albert Pujols 10.53
2011 Frank Isbell 12.84 Albert Pujols 10.13
2012 Frank Isbell 12.84 Adrián González 10.12
2013 Frank Isbell 12.84 Garrett Jones 10.53
2014 Frank Isbell 12.84 Ike Davis 10.59
2015 Frank Isbell 12.84 Sean Rodríguez 10.50
2016 Frank Isbell 12.84 Matt Adams 10.29
2017 Frank Isbell 12.84 Mark Reynolds 9.82
2018 Frank Isbell 12.84 Matt Olson 9.54
2019 Frank Isbell 12.84 Daniel Murphy 10.36
2020 Frank Isbell 12.84 Jesús Aguilar 9.07
2021 Frank Isbell 12.84 C.J. Cron 9.29
2022 Frank Isbell 12.84 C.J. Cron 9.56
2023 Frank Isbell 12.84 LaMonte Wade Jr. 9.51
2024 Frank Isbell 12.84 Michael Toglia 9.26
2025 Frank Isbell 12.84 Michael Toglia 9.52
2026 Frank Isbell 12.84 Rafael Devers 9.27