Yearly League Leaders & Records for Range Factor/9Inn as P

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Table
Year National League RF/9 American League RF/9 Other RF/9 Other RF/9
2026Colin Rea (CHC)2.77 Nathan Eovaldi (TEX)2.24
2025Yoshinobu Yamamoto (LAD)2.28 Max Fried (NYY)2.26
2024Jake Irvin (WSN)2.16 Tanner Houck (BOS)2.57
2023Patrick Corbin (WSN)2.35 José Berríos (TOR)1.95
2022Kyle Wright (ATL)2.30 Jordan Lyles (BAL)1.41
2021Marcus Stroman (NYM)2.46 Dallas Keuchel (CHW)2.67
2020Alec Mills (CHC)2.31 Zack Greinke (HOU)2.15
2019Joe Musgrove (PIT)2.85 Rick Porcello (BOS)1.91
2018Zack Greinke (ARI)2.47 Kyle Gibson (MIN)1.83
2017R.A. Dickey (ATL)2.79 Marcus Stroman (TOR)2.06
2016Mike Leake (STL)3.11 Aaron Sanchez (TOR)2.25
2015Jake Arrieta (CHC)3.22 Dallas Keuchel (HOU)2.75
2014Henderson Alvarez III (MIA)2.60 Dallas Keuchel (HOU)2.93
2013Kyle Kendrick (PHI)2.77 Doug Fister (DET)2.29
2012Jake Westbrook (STL)2.83 Justin Masterson (CLE)2.53
2011Jake Westbrook (STL)3.53 Mark Buehrle (CHW)2.41
2010R.A. Dickey (NYM)3.15 Justin Masterson (CLE)2.80
2009Joel Piñeiro (STL)2.44 Mark Buehrle (CHW)2.28
2008Greg Maddux+ (2TM)3.43 Kenny Rogers (DET)3.94
2007Greg Maddux+ (SDP)3.18 Roberto Hernández (CLE)2.60
2006Aaron Cook (COL)2.84 Jake Westbrook (CLE)3.11
2005Tim Hudson (ATL)2.95 Jake Westbrook (CLE)3.42
2004Kirk Rueter (SFG)3.26 Jake Westbrook (CLE)3.05
2003Mike Hampton (ATL)3.17 Derek Lowe (BOS)2.88
2002Greg Maddux+ (ATL)3.12 Cory Lidle (OAK)2.67
2001Greg Maddux+ (ATL)2.82 Freddy García (SEA)2.56
2000Greg Maddux+ (ATL)3.36 Kenny Rogers (TEX)2.53
1999Greg Maddux+ (ATL)3.57 Mike Mussina+ (BAL)2.66
1998Greg Maddux+ (ATL)3.37 Kenny Rogers (OAK)3.24
1997Roger Bailey (COL)3.06 Bob Tewksbury (MIN)2.72
1996Greg Maddux+ (ATL)3.97 Scott Erickson (BAL)2.96
1995Greg Maddux+ (ATL)3.05 Kevin Brown (BAL)4.28
1994Orel Hershiser (LAD)3.06 Mike Moore (DET)3.03
1993Greg Maddux+ (ATL)3.30 Mike Moore (DET)2.95
1992Greg Maddux+ (CHC)3.16 Bill Wegman (MIL)2.68
1991Greg Maddux+ (CHC)3.05 Bill Wegman (MIL)2.89
1990Greg Maddux+ (CHC)3.57 Greg Harris (BOS)2.88
1989Greg Maddux+ (CHC)2.87 Tom Candiotti (CLE)3.01
1988Orel Hershiser (LAD)3.10 Chris Bosio (MIL)2.72
1987Mike LaCoss (SFG)3.05 Mark Gubicza (KCR)2.68
1986John Denny (CIN)2.94 Mike Boddicker (BAL)2.64
1985Rick Reuschel (PIT)2.97 Mike Boddicker (BAL)3.19
1984Steve Trout (CHC)2.89 Mike Boddicker (BAL)3.38
1983Chuck Rainey (CHC)3.11 Mike Boddicker (BAL)2.82
1982Charlie Puleo (NYM)2.74 Bob Stanley (BOS)2.99
1981Mike Scott (NYM)3.24 John Denny (CLE)3.34
1980Rick Reuschel (CHC)2.94 Dave Stieb (TOR)2.89
1979Joaquín Andújar (HOU)3.06 Rick Wise (CLE)2.95
1978John Denny (STL)3.46 Rick Waits (CLE)2.66
1977Bill Bonham (CHC)2.64 Fernando Arroyo (DET)3.35
1976Randy Jones (SDP)3.20 Gary Ross (CAL)3.12
1975Jim Barr (SFG)2.80 Steve Hargan (TEX)2.61
1974Mike Torrez (MON)3.24 Al Fitzmorris (KCR)2.79
1973Tommy John (LAD)3.26 Clyde Wright (CAL)2.77
1972Mike Caldwell (SDP)3.08 Steve Kline (NYY)2.67
1971Claude Osteen (LAD)3.06 Steve Kline (NYY)2.96
1970Jim McGlothlin (CIN)3.03 Joe Horlen (CHW)3.34
1969Steve Blass (PIT)2.66 Mel Stottlemyre (NYY)3.33
1968Al McBean (PIT)3.18 Tommy John (CHW)3.25
1967Larry Jackson (PHI)2.92 Tommy John (CHW)3.63
1966Al Jackson (STL)3.06 Joe Horlen (CHW)3.50
1965Claude Osteen (LAD)2.92 Fred Newman (CAL)3.73
1964Larry Jackson (CHC)3.30 Fred Newman (LAA)3.08
1963Bob Miller (LAD)3.32 Jim Kaat+ (MIN)3.13
1962Al Jackson (NYM)3.11 Jim Kaat+ (MIN)2.94
1961Bob Purkey (CIN)3.58 Milt Pappas (BAL)2.94
1960Lew Burdette (MLN)3.23 Tom Brewer (BOS)2.89
1959Stu Miller (SFG)2.95 Bill Fischer (WSH)3.31
1958Glen Hobbie (CHC)2.99 Ned Garver (KCA)3.36
1957Don Drysdale+ (BRO)3.05 Bobby Shantz (NYY)3.69
1956Hal Jeffcoat (CIN)3.32 Bob Lemon+ (CLE)2.99
1955Rubén Gómez (NYG)2.96 Tom Brewer (BOS)2.76
1954Gerry Staley (STL)3.35 George Zuverink (DET)2.84
1953Paul Minner (CHC)3.00 Bob Lemon+ (CLE)3.30
1952Gerry Staley (STL)3.08 Sid Hudson (2TM)3.65
1951Jim Hearn (NYG)3.28 Dizzy Trout (DET)3.05
1950Johnny Schmitz (CHC)3.50 Bob Hooper (PHA)2.96
1949Howie Fox (CIN)3.31 Bob Lemon+ (CLE)3.38
1948Johnny Schmitz (CHC)3.16 Bob Lemon+ (CLE)3.34 NN2: Jonas Gaines (BEG)3.35NAL: Jim LaMarque (KCM)3.28
1947Al Brazle (STL)2.73 Bob Lemon+ (CLE)3.13 NN2: Bud Barbee (NBY)3.80NAL: Gentry Jessup (CAG)4.46
1946Murry Dickson (STL)3.18 Dutch Leonard (WSH)2.83 NN2: Alex Newkirk (NBY)3.46NAL: Vibert Clarke (CBE)4.25
1945Howie Fox (CIN)3.35 Russ Christopher (PHA)3.85 NN2: Patricio Scantlebury (NYC)3.68NAL: Johnny Williams (CC)4.12
1944Nick Strincevich (PIT)3.74 Russ Christopher (PHA)3.56 NN2: Neck Stanley (NBY)3.80NAL: Antonio Ruiz (CC)4.69
1943Hank Wyse (CHC)3.23 Dizzy Trout (DET)3.17 NN2: Leon Day+ (NE)3.25NAL: Jack Matchett (KCM)4.21
1942Harry Gumbert (STL)3.64 Russ Christopher (PHA)3.82 NN2: Bill Harvey (BEG)4.11NAL: Willie Jefferson (CCB)5.09
1941Harry Gumbert (2TM)3.58 Johnny Gorsica (DET)3.26 NN2: Emery Adams (BEG)3.84NAL: Frank McAllister (SNS)4.76
1940Vern Olsen (CHC)3.23 Johnny Gorsica (DET)3.83 NN2: José Figueroa (NYC)3.93NAL: Floyd Kranson (KCM)5.54
1939Harry Gumbert (NYG)3.47 Johnny Allen (CLE)2.73 NN2: James Brown (NE)3.60NAL: Theolic Smith (SL3)5.48
1938Harry Gumbert (NYG)3.55 Spud Chandler (NYY)3.56 NN2: Roy Partlow (HG)3.35NAL: Floyd Kranson (KCM)4.30
1937Harry Gumbert (NYG)4.32 Elden Auker (DET)3.09 NN2: Edsall Walker (HG)4.60NAL: Floyd Kranson (3TM)4.57
1936Bucky Walters (PHI)3.87 Elden Auker (DET)2.93 NN2: Ray Brown+ (HG)4.32
1935Hal Schumacher (NYG)3.54 Mel Harder (CLE)3.10 NN2: Paul Carter (PS)4.12
1934Curt Davis (PHI)3.81 Willis Hudlin (CLE)3.32 NN2: Phil Cockrell (PS)4.79
1933Carl Hubbell+ (NYG)3.41 Mel Harder (CLE)3.88 NN2: Ray Brown+ (HG)4.71
1932Freddie Fitzsimmons (NYG)3.55 Bob Kline (BOS)3.14 EWL: Chet Brewer (WAP)6.02NSL: Homer Curry (2TM)4.86
1931Freddie Fitzsimmons (NYG)3.61 Wilcy Moore (BOS)3.50 NNL: Luther McDonald (2TM)4.25
1930Freddie Fitzsimmons (NYG)3.70 Willis Hudlin (CLE)3.11 NNL: Chet Brewer (KCM)4.61
1929Ben Cantwell (BSN)3.73 George Blaeholder (SLB)3.61 ANL: Script Lee (BBS)4.79NNL: Chet Brewer (KCM)4.26
1928Clarence Mitchell (2TM)3.29 George Blaeholder (SLB)3.49 NNL: Eddie Miller (CAG)4.71ECL: Laymon Yokely (BBS)4.98
1927Dolf Luque (CIN)3.19 Wilcy Moore (NYY)4.52 NNL: David Gómez (CSW)5.17ECL: Script Lee (HIL)4.81
1926Carl Mays (CIN)4.26 Ernie Wingard (SLB)3.62 NNL: John Williams (DM)4.35ECL: Phil Cockrell (HIL)4.04
1925Burleigh Grimes+ (BRO)4.01 Ted Wingfield (BOS)4.00 NNL: Ed Rile (ABC)5.03ECL: John Taylor (NLG)4.55
1924Carl Mays (CIN)4.26 Eddie Rommel (PHA)3.79 NNL: Ed Rile (CAG)4.88ECL: Rube Curry (HIL)4.65
1923Fred Toney (STL)3.29 Eddie Rommel (PHA)3.81 NNL: Cool Papa Bell+ (SLS)4.74ECL: Phil Cockrell (HIL)4.78
1922Burleigh Grimes+ (BRO)3.16 Carl Mays (NYY)3.83 NNL: Cool Papa Bell+ (SLS)4.54
1921Sherry Smith (BRO)4.01 Roy Wilkinson (CHW)4.00 NNL: Lucas Boada (CS)4.97
1920Rube Benton (NYG)4.06 Eddie Rommel (PHA)4.09 NNL: Tom Williams (CAG)4.93
1919Bill Doak (STL)3.95 Scott Perry (PHA)4.40
1918Bill Doak (STL)4.05 Fritz Coumbe (CLE)4.50
1917Red Ames (STL)3.75 Carl Mays (BOS)4.36
1916Gene Packard (CHC)4.53 Carl Mays (BOS)4.78
1915Bill Doak (STL)3.85 Hooks Dauss (DET)4.30 FL: Gene Krapp (BUF)4.40
1914Bill Doak (STL)3.59 Harry Coveleski (DET)4.01 FL: Gene Packard (KCP)4.35
1913Lefty Tyler (BSN)3.72 Jean Dubuc (DET)4.56
1912Ed Reulbach (CHC)3.62 George McConnell (NYY)4.27
1911Frank Smith (CIN)4.19 Ed Walsh+ (CHW)4.54
1910Cliff Curtis (BSN)3.98 Ed Willett (DET)4.78
1909Frank Corridon (PHI)4.11 Ed Walsh+ (CHW)4.54
1908Chick Fraser (CHC)4.14 Ed Walsh+ (CHW)4.48
1907Elmer Stricklett (BRO)4.38 Ed Walsh+ (CHW)5.59
1906Elmer Stricklett (BRO)4.62 Harry Howell (SLB)4.61
1905Elmer Stricklett (BRO)4.75 Harry Howell (SLB)5.54
1904Frank Corridon (2TM)4.27 Harry Howell (SLB)5.07
1903John Menefee (CHC)4.22 Frank Owen (CHW)4.26
1902Bob Wicker (STL)3.67 Harry Howell (BLA)4.43
1901Bill Duggleby (PHI)3.78 Jimmy Callahan (CHW)4.27
1900Ed Scott (CIN)4.03
1899Walt Woods (LOU)3.77
1898Willie Sudhoff (STL)3.69
1897Chick Fraser (LOU)3.78
1896Zeke Wilson (CLV)4.05
1895Cozy Dolan (BSN)3.41
1894Les German (NYG)3.09
1893Scott Stratton (LOU)3.31
1892Jesse Duryea (2TM)3.65
1891John Thornton (PHI)2.98 AA: Kid Madden (2TM)3.41
1890Bob Caruthers (BRO)2.97 AA: Mike Morrison (2TM)3.12PL: Charlie Bartson (CHI)4.16
1889John Clarkson+ (BSN)3.02 AA: Park Swartzel (KCC)3.05
1888Charlie Buffinton (PHI)3.44 AA: Tom Sullivan (KCC)3.56
1887Pud Galvin+ (PIT)2.96 AA: Bob Caruthers (STL)3.48
1886Charlie Ferguson (PHI)2.95 AA: Adonis Terry (BRO)2.66
1885Jim McCormick (2TM)3.46 AA: John Harkins (BRO)2.86
1884John Clarkson+ (CHC)3.36 AA: Denny Driscoll (LOU)3.53UA: Bob Black (KCC)3.29
1883Jim McCormick (CLV)3.13 AA: Denny Driscoll (PIT)3.03
1882George Bradley (CLV)3.18 AA: Guy Hecker (LOU)4.76
1881Fred Goldsmith (CHC)3.08
1880Tommy Bond (BSN)3.16
1879Frank Hankinson (CHC)3.23
1878Tricky Nichols (PRO)3.03
1877Tommy Bond (BSN)2.30
1876Tommy Bond (HAR)2.60
1875 NA: Tricky Nichols (NHV)3.78
1874 NA: Tommy Bond (BRA)2.97
1873 NA: Al Spalding+ (BOS)2.92
1872 NA: Al Spalding+ (BOS)2.87
1871 NA: Cherokee Fisher (ROK)3.21