Progressive Hits per 9IP
Leaderboard
 
This table is a snapshot of the career, single-season, active, and yearly leaders at the end of each season.
* - Indicates Hall of Fame
Bold - Indicates active player
Year    Career H9    Single-Season H9    Active H9    Yearly H9 
1930      Percy Jones 7.90      Percy Jones 7.90 
1931      Hub Pruett 7.02      Hub Pruett 7.02 
1932    Roy Moore 8.89    Hub Pruett 7.02    Roy Moore 8.89    Hub Pruett 7.48 
1933    Hub Pruett 7.46    Hub Pruett 6.91    Hub Pruett 7.46    Hub Pruett 6.91 
1934    Hub Pruett 7.50    Hub Pruett 6.91    Hub Pruett 7.50    Hub Pruett 7.74 
1935    Walter Beall 7.56    Walter Beall 6.71    Walter Beall 7.56    Walter Beall 6.71 
1936    Walter Beall 7.57    Walter Beall 6.71    Walter Beall 7.57    Walter Beall 7.60 
1937    Walter Beall 7.56    Walter Beall 6.71    Walter Beall 7.56    Hub Pruett 7.31 
1938    Walter Beall 7.59    Walter Beall 6.71    Walter Beall 7.59    Pat Malone 7.04 
1939    Walter Beall 7.59    Walter Beall 6.71    Hub Pruett 7.72    Whitey Wilshere 7.58 
1940    Walter Beall 7.59    Walter Beall 6.71    Pat Malone 7.96    Johnny Vander Meer 7.11 
1941    Johnny Vander Meer 7.42    Walter Beall 6.71    Johnny Vander Meer 7.42    Bill Sayles 7.10 
1942    Johnny Vander Meer 7.48    Walter Beall 6.71    Johnny Vander Meer 7.48    Bill Sayles 7.01 
1943    Johnny Vander Meer 7.46    Walter Beall 6.71    Johnny Vander Meer 7.46    Johnny Vander Meer 7.39 
1944    Johnny Vander Meer 7.58    Walter Beall 6.71    Johnny Vander Meer 7.58    Earl Johnson * 7.41 
1945    Johnny Vander Meer 7.50    Walter Beall 6.71    Johnny Vander Meer 7.50    Johnny Vander Meer 6.97 
1946    Johnny Vander Meer 7.47    Jack Salveson 6.47    Johnny Vander Meer 7.47    Jack Salveson 6.47 
1947    Johnny Vander Meer 7.48    Jack Salveson 6.47    Johnny Vander Meer 7.48    Joe Page 6.56 
1948    Joe Page 7.33    Johnny Vander Meer 6.46    Joe Page 7.33    Johnny Vander Meer 6.46 
1949    Johnny Vander Meer 7.38    Johnny Vander Meer 6.46    Johnny Vander Meer 7.38    Warren Spahn * 6.58 
1950    Johnny Vander Meer 7.37    Warren Spahn * 6.39    Johnny Vander Meer 7.37    Warren Spahn * 6.39 
1951    Johnny Vander Meer 7.41    Warren Spahn * 6.39    Johnny Vander Meer 7.41    Warren Spahn * 6.65 
1952    Johnny Vander Meer 7.41    Warren Spahn * 6.39    Johnny Vander Meer 7.41    Howie Pollet 6.55 
1953    Warren Spahn * 7.25    Warren Spahn * 5.85    Warren Spahn * 7.25    Warren Spahn * 5.85 
1954    Warren Spahn * 7.19    Warren Spahn * 5.85    Warren Spahn * 7.19    Kent Peterson 6.54 
1955    Warren Spahn * 7.13    Ryne Duren 5.51    Warren Spahn * 7.13    Ryne Duren 5.51 
1956    Warren Spahn * 7.07    Ryne Duren 5.51    Warren Spahn * 7.07    Herb Score 5.74 
1957    Kent Peterson 7.02    Ryne Duren 5.51    Kent Peterson 7.02    Ryne Duren 5.74 
1958    Ryne Duren 6.15    Ryne Duren 5.51    Ryne Duren 6.15    Herb Score 5.68 
1959    Herb Score 6.04    Ryne Duren 5.51    Herb Score 6.04    Ryne Duren 6.10 
1960    Herb Score 5.74    Herb Score 4.40    Herb Score 5.74    Herb Score 4.40 
1961    Herb Score 5.67    Herb Score 4.40    Herb Score 5.67    Herb Score 5.29 
1962    Herb Score 5.59    Herb Score 4.40    Herb Score 5.59    Herb Score 5.13 
1963    Herb Score 5.52    Herb Score 4.40    Herb Score 5.52    Herb Score 5.13 
1964    Herb Score 5.49    Herb Score 4.40    Herb Score 5.49    Herb Score 5.24 
1965    Herb Score 5.53    Herb Score 4.40    Herb Score 5.53    Charlie Beamon 5.45 
1966    Herb Score 5.56    Herb Score 4.40    Herb Score 5.56    Jim Brewer * 5.79 
1967    Herb Score 5.68    Herb Score 4.40    Herb Score 5.68    Nolan Ryan 5.93 
1968    Herb Score 5.70    Herb Score 4.40    Herb Score 5.70    Herb Score 5.93 
1969    Herb Score 5.72    Herb Score 4.40    Herb Score 5.72    Herb Score 6.04 
1970    Herb Score 5.80    Herb Score 4.40    Herb Score 5.80    Don Sutton 6.32 
1971    Herb Score 5.85    Herb Score 4.40    Herb Score 5.85    Rollie Fingers 5.87 
1972    Herb Score 5.85    Herb Score 4.40    Nolan Ryan 6.48    John Hiller 5.34 
1973    Herb Score 5.85    Herb Score 4.40    Nolan Ryan 6.51    Billy McCool 6.24 
1974    Herb Score 5.85    Herb Score 4.40    Nolan Ryan 6.59    Billy McCool 6.47 
1975    Herb Score 5.85    Herb Score 4.40    Nolan Ryan 6.63    Jim Brewer * 6.13 
1976    Herb Score 5.85    Herb Score 4.40    Nolan Ryan 6.68    Rich Gossage 6.48 
1977    Herb Score 5.85    Herb Score 4.40    J.R. Richard * 6.82    Dave Boswell 6.59 
1978    Herb Score 5.85    Herb Score 4.40    Nolan Ryan 6.85    Mike Marshall 6.96 
1979    Herb Score 5.85    Herb Score 4.40    Nolan Ryan 6.83    Frank Riccelli 6.74 
1980    Herb Score 5.85    Herb Score 4.40    Nolan Ryan 6.83    J.R. Richard * 6.73 
1981    Herb Score 5.85    Herb Score 4.40    Nolan Ryan 6.85    Balor Moore 6.65 
1982    Herb Score 5.85    Herb Score 4.40    Nolan Ryan 6.85    Bill Slayback 6.58 
1983    Herb Score 5.85    Herb Score 4.40    Nolan Ryan 6.85    Joe Beckwith 6.48 
1984    Herb Score 5.85    Herb Score 4.40    Nolan Ryan 6.86    J.R. Richard * 6.72 
1985    Herb Score 5.85    Herb Score 4.40    J.R. Richard * 7.05    Bart Johnson 5.75 
1986    Herb Score 5.85    Herb Score 4.40    J.R. Richard * 7.08    Ken Dayley 6.44 
1987    Herb Score 5.85    Herb Score 4.40    J.R. Richard * 7.18    Duane Ward 5.79 
1988    Herb Score 5.85    Herb Score 4.40    J.R. Richard * 7.18    Dwight Gooden 5.13 
1989    Dwight Gooden 5.74    Herb Score 4.40    Dwight Gooden 5.74    Dwight Gooden 5.01 
1990    Dwight Gooden 5.78    Herb Score 4.40    Dwight Gooden 5.78    Duane Ward 6.17