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| Single-Season Hits per 9IP Leaderboard | |
| * - Indicates Hall of Fame |
| Rank | Player | Hits per 9IP | IP | Year | Career Leaderboard |
| 1. | Herb Score | 4.40 | 262.0 | 1960 | |
| 2. | Dwight Gooden | 5.01 | 237.3 | 1989 | |
| 3. | Herb Score | 5.13 | 324.7 | 1963 | |
| 4. | Herb Score | 5.13 | 298.3 | 1962 | |
| 5. | Dwight Gooden | 5.13 | 207.0 | 1988 | |
| 6. | Herb Score | 5.24 | 311.0 | 1964 | |
| 7. | Herb Score | 5.29 | 250.0 | 1961 | |
| 8. | John Hiller | 5.34 | 205.7 | 1972 | |
| 9. | Charlie Beamon | 5.45 | 310.7 | 1965 | |
| 10. | Kent Peterson | 5.50 | 263.7 | 1960 | |
| 11. | Ryne Duren | 5.51 | 289.0 | 1955 | |
| 12. | Kent Peterson | 5.60 | 168.7 | 1962 | |
| 13. | Tom Qualters | 5.63 | 294.3 | 1961 | |
| 14. | Charlie Beamon | 5.67 | 293.7 | 1964 | |
| 15. | Herb Score | 5.68 | 272.7 | 1958 | |
| 16. | Ryne Duren | 5.74 | 177.3 | 1957 | |
| 17. | Herb Score | 5.74 | 227.3 | 1956 | |
| 18. | Bart Johnson | 5.75 | 307.0 | 1985 | |
| 19. | Duane Ward | 5.79 | 171.0 | 1987 | |
| 20. | Jim Brewer * | 5.79 | 281.3 | 1966 | |
| 21. | Herb Score | 5.79 | 276.7 | 1966 | |
| 22. | Warren Spahn * | 5.85 | 378.7 | 1953 | |
| 23. | Herb Score | 5.85 | 255.3 | 1957 | |
| 24. | Rollie Fingers | 5.87 | 178.0 | 1971 | |
| 25. | Gus Keriazakos | 5.87 | 239.0 | 1964 | |
| 26. | Kent Peterson | 5.90 | 323.3 | 1955 | |
| 27. | Herb Score | 5.91 | 306.3 | 1965 | |
| 28. | Kent Peterson | 5.91 | 263.3 | 1957 | |
| 29. | Herb Score | 5.93 | 312.7 | 1968 | |
| 30. | Nolan Ryan | 5.93 | 289.7 | 1967 | |
| 31. | Jim Brewer * | 5.95 | 299.7 | 1967 | |
| 32. | Sandy Koufax * | 5.96 | 297.3 | 1960 | |
| 33. | Sandy Koufax * | 5.97 | 272.7 | 1971 | |
| 34. | Kent Peterson | 5.98 | 328.3 | 1961 | |
| 35. | Masanori Murakami | 5.99 | 240.3 | 1968 | |
| 36. | Charlie Beamon | 6.00 | 273.0 | 1963 | |
| 37. | Gus Keriazakos | 6.03 | 319.7 | 1961 | |
| 38. | Herb Score | 6.04 | 238.3 | 1969 | |
| 39. | Randy Johnson | 6.05 | 242.7 | 1988 | |
| 40. | Marshall Bridges | 6.05 | 163.7 | 1961 | |
| 41. | Jim Brewer * | 6.07 | 286.0 | 1968 | |
| 42. | Gus Keriazakos | 6.08 | 294.7 | 1965 | |
| 43. | Karl Spooner | 6.09 | 286.7 | 1961 | |
| 44. | Ryne Duren | 6.10 | 277.3 | 1959 | |
| 45. | Sandy Koufax * | 6.11 | 325.7 | 1964 | |
| 46. | Gus Keriazakos | 6.11 | 306.3 | 1963 | |
| 47. | Jim Brewer * | 6.13 | 223.0 | 1975 | |
| 48. | Sandy Koufax * | 6.14 | 330.0 | 1968 | |
| 49. | Gus Keriazakos | 6.14 | 255.0 | 1966 | |
| 50. | Ryne Duren | 6.15 | 282.7 | 1961 | |
| 51. | Bobby Witt | 6.17 | 227.7 | 1988 | |
| 52. | Duane Ward | 6.17 | 182.3 | 1990 | |
| 53. | J.R. Richard * | 6.18 | 233.0 | 1975 | |
| 54. | Karl Spooner | 6.18 | 305.7 | 1965 | |
| 55. | Ryne Duren | 6.20 | 280.0 | 1956 | |
| 56. | Joe Presko | 6.21 | 326.3 | 1961 | |
| 57. | Mark Littell | 6.23 | 172.0 | 1985 | |
| 58. | Gene Conley * | 6.23 | 349.7 | 1961 | |
| 59. | George Brunet | 6.24 | 280.0 | 1961 | |
| 60. | Billy McCool | 6.24 | 220.7 | 1973 | |
| 61. | Gene Conley * | 6.26 | 335.0 | 1959 | |
| 62. | Sandy Koufax * | 6.26 | 281.7 | 1959 | |
| 63. | Gus Keriazakos | 6.27 | 311.3 | 1960 | |
| 64. | John Gelnar | 6.30 | 273.0 | 1969 | |
| 65. | Bill Butler | 6.30 | 188.7 | 1975 | |
| 66. | John Hiller | 6.31 | 245.3 | 1975 | |
| 67. | Rich Bordi | 6.31 | 242.3 | 1989 | |
| 68. | Jack Meyer | 6.32 | 252.0 | 1956 | |
| 69. | Dwight Gooden | 6.32 | 237.7 | 1985 | |
| 70. | Don Sutton | 6.32 | 259.0 | 1970 | |
| 71. | Joe Presko | 6.33 | 292.7 | 1962 | |
| 72. | Balor Moore | 6.34 | 262.7 | 1985 | |
| 73. | Randy Johnson | 6.35 | 238.0 | 1990 | |
| 74. | Nolan Ryan | 6.36 | 300.0 | 1968 | |
| 75. | Larry Sherry | 6.38 | 234.0 | 1965 | |
| 76. | Warren Spahn * | 6.39 | 369.0 | 1950 | |
| 77. | Nolan Ryan | 6.40 | 256.0 | 1970 | |
| 78. | Charlie Beamon | 6.40 | 243.3 | 1968 | |
| 79. | Tom Qualters | 6.41 | 203.7 | 1969 | |
| 80. | Warren Spahn * | 6.41 | 276.7 | 1959 | |
| 81. | Warren Spahn * | 6.41 | 367.7 | 1956 | |
| 82. | Nolan Ryan | 6.42 | 263.7 | 1966 | |
| 83. | Kent Peterson | 6.43 | 298.0 | 1959 | |
| 84. | Karl Spooner | 6.44 | 232.0 | 1962 | |
| 85. | Ken Dayley | 6.44 | 250.0 | 1986 | |
| 86. | Tom Qualters | 6.45 | 277.7 | 1965 | |
| 87. | Johnny Vander Meer | 6.46 | 305.3 | 1948 | |
| 88. | Jack Salveson | 6.47 | 268.7 | 1946 | |
| 89. | Jack Meyer | 6.47 | 253.3 | 1957 | |
| 90. | Billy McCool | 6.47 | 207.3 | 1974 | |
| 91. | Warren Spahn * | 6.48 | 348.7 | 1955 | |
| 92. | Rich Bordi | 6.48 | 259.7 | 1988 | |
| 93. | Joe Beckwith | 6.48 | 218.0 | 1983 | |
| 94. | Rich Gossage | 6.48 | 229.0 | 1976 | |
| 95. | Hal Reniff | 6.49 | 212.3 | 1968 | |
| 96. | Dean Stone | 6.49 | 309.3 | 1957 | |
| 97. | Joey McLaughlin | 6.49 | 226.0 | 1985 | |
| 98. | Hal Reniff | 6.50 | 272.7 | 1966 | |
| 99. | Karl Spooner | 6.50 | 293.3 | 1959 | |
| 100. | Bobby Witt | 6.51 | 225.3 | 1989 | |
| 101. | Bill Stoneman | 6.52 | 168.3 | 1970 | |
| 102. | Tommy Hughes | 6.54 | 309.7 | 1953 | |
| 103. | Kent Peterson | 6.54 | 302.7 | 1954 | |
| 104. | Ryne Duren | 6.55 | 288.7 | 1960 | |
| Howie Pollet | 6.55 | 288.7 | 1952 | ||
| 106. | Ted Gray | 6.56 | 317.0 | 1958 | |
| 107. | George Brunet | 6.56 | 263.3 | 1960 | |
| 108. | Lance Rautzhan | 6.56 | 192.0 | 1987 | |
| 109. | Joe Page | 6.56 | 277.0 | 1947 | |
| 110. | Balor Moore | 6.56 | 216.7 | 1986 | |
| 111. | Bill Slayback | 6.58 | 260.0 | 1982 | |
| 112. | Karl Spooner | 6.58 | 325.3 | 1956 | |
| 113. | Warren Spahn * | 6.58 | 367.7 | 1949 | |
| 114. | Dave Boswell | 6.59 | 168.0 | 1977 | |
| 115. | John Hiller | 6.59 | 240.3 | 1973 | |
| 116. | Randy Myers | 6.59 | 187.0 | 1987 | |
| 117. | Gene Conley * | 6.60 | 334.3 | 1963 | |
| 118. | Jim Brewer * | 6.60 | 191.0 | 1971 | |
| 119. | Tom Qualters | 6.60 | 294.7 | 1962 | |
| 120. | Lance McCullers | 6.60 | 167.7 | 1986 | |
| 121. | Gene Conley * | 6.62 | 307.3 | 1957 | |
| 122. | Gus Keriazakos | 6.63 | 253.7 | 1968 | |
| 123. | Balor Moore | 6.65 | 284.3 | 1981 | |
| 124. | Herb Score | 6.65 | 274.7 | 1959 | |
| 125. | Warren Spahn * | 6.65 | 374.7 | 1951 | |
| 126. | Masanori Murakami | 6.66 | 288.0 | 1966 | |
| 127. | Sandy Koufax * | 6.66 | 337.7 | 1962 | |
| 128. | Tom Qualters | 6.66 | 289.0 | 1964 | |
| 129. | Duane Ward | 6.67 | 193.0 | 1988 | |
| 130. | John Hiller | 6.67 | 194.3 | 1969 | |
| 131. | Tom Qualters | 6.67 | 267.0 | 1963 | |
| 132. | Ted Gray | 6.67 | 299.3 | 1953 | |
| 133. | Chuck Stobbs * | 6.68 | 368.0 | 1960 | |
| 134. | Dave Beard | 6.68 | 190.0 | 1987 | |
| 135. | Juan Marichal * | 6.68 | 254.7 | 1971 | |
| 136. | Sandy Koufax * | 6.69 | 296.0 | 1961 | |
| 137. | Warren Spahn * | 6.69 | 376.7 | 1954 | |
| 138. | Jim Brewer * | 6.69 | 277.0 | 1964 | |
| 139. | Johnny Antonelli | 6.69 | 325.3 | 1959 | |
| 140. | Nolan Ryan | 6.70 | 251.3 | 1971 | |
| 141. | J.R. Richard * | 6.70 | 286.0 | 1973 | |
| 142. | Larry Sherry | 6.71 | 210.7 | 1963 | |
| 143. | Walter Beall | 6.71 | 220.0 | 1935 | |
| 144. | Nolan Ryan | 6.71 | 253.3 | 1972 | |
| 145. | Don Sutton | 6.72 | 234.3 | 1968 | |
| 146. | J.R. Richard * | 6.72 | 251.7 | 1984 | |
| 147. | J.R. Richard * | 6.73 | 214.0 | 1980 | |
| 148. | Kent Peterson | 6.74 | 299.3 | 1951 | |
| 149. | Frank Riccelli | 6.74 | 227.0 | 1979 | |
| 150. | Dave Laroche | 6.74 | 236.3 | 1979 | |
| 151. | Mark Langston | 6.74 | 251.0 | 1986 | |
| 152. | Johnny Antonelli | 6.75 | 322.7 | 1964 | |
| 153. | Don Sutton | 6.76 | 269.0 | 1969 | |
| 154. | Don Demola | 6.76 | 265.0 | 1980 | |
| 155. | Dean Stone | 6.76 | 262.3 | 1956 | |
| 156. | Rich Bordi | 6.76 | 214.3 | 1990 | |
| 157. | Jose Nunez | 6.76 | 166.3 | 1989 | |
| 158. | Kent Peterson | 6.77 | 313.7 | 1952 | |
| 159. | Herb Score | 6.78 | 228.3 | 1971 | |
| 160. | Dean Chance | 6.78 | 355.7 | 1968 | |
| 161. | Rollie Fingers | 6.78 | 262.7 | 1970 | |
| 162. | Masanori Murakami | 6.79 | 285.0 | 1965 | |
| 163. | Dwight Gooden | 6.79 | 221.3 | 1987 | |
| 164. | Charlie Beamon | 6.80 | 237.0 | 1966 | |
| 165. | Frank Williams | 6.80 | 189.3 | 1989 | |
| 166. | Kent Peterson | 6.80 | 235.7 | 1956 | |
| 167. | Bob Lacey | 6.80 | 164.0 | 1981 | |
| 168. | Warren Spahn * | 6.81 | 366.3 | 1958 | |
| 169. | Bob Ojeda | 6.81 | 199.7 | 1989 | |
| 170. | Matt Williams | 6.81 | 197.0 | 1988 | |
| 171. | John Gelnar | 6.81 | 268.3 | 1967 | |
| 172. | Dave Boswell | 6.81 | 265.7 | 1968 | |
| 173. | John Gelnar | 6.81 | 222.0 | 1970 | |
| 174. | Gene Conley * | 6.81 | 253.7 | 1956 | |
| 175. | Charlie Beamon | 6.81 | 212.7 | 1969 | |
| 176. | J.R. Richard * | 6.82 | 269.3 | 1977 | |
| 177. | Lance McCullers | 6.82 | 182.0 | 1988 | |
| 178. | Sandy Koufax * | 6.83 | 266.3 | 1970 | |
| 179. | Ralph Lumenti | 6.83 | 286.0 | 1964 | |
| 180. | Karl Spooner | 6.84 | 300.0 | 1963 | |
| 181. | Nolan Ryan | 6.84 | 217.0 | 1973 | |
| 182. | Bill Butler | 6.84 | 238.0 | 1977 | |
| 183. | Ralph Lumenti | 6.85 | 182.7 | 1971 | |
| 184. | Tom Qualters | 6.85 | 279.7 | 1966 | |
| 185. | Ted Gray | 6.86 | 299.3 | 1955 | |
| 186. | Don Sutton | 6.86 | 169.3 | 1981 | |
| 187. | Gus Keriazakos | 6.86 | 313.7 | 1962 | |
| 188. | Dick Selma | 6.86 | 162.7 | 1975 | |
| 189. | Sandy Koufax * | 6.87 | 277.7 | 1963 | |
| 190. | Luis Deleon | 6.87 | 258.0 | 1984 | |
| 191. | Jack Morris | 6.88 | 284.0 | 1981 | |
| 192. | Sandy Koufax * | 6.88 | 176.7 | 1955 | |
| 193. | Lance McCullers | 6.88 | 171.3 | 1989 | |
| 194. | Tommy Hughes | 6.88 | 290.3 | 1955 | |
| 195. | Steve Bedrosian | 6.88 | 204.0 | 1988 | |
| 196. | Bob Veale | 6.88 | 270.7 | 1968 | |
| 197. | J.R. Richard * | 6.89 | 232.7 | 1974 | |
| 198. | John Gelnar | 6.89 | 275.7 | 1971 | |
| 199. | Bill Landis | 6.89 | 209.0 | 1975 | |
| 200. | Mark Langston | 6.89 | 218.0 | 1987 | |
| 201. | Jim Brewer * | 6.90 | 285.7 | 1962 | |
| 202. | Bruce Hurst | 6.91 | 230.7 | 1989 | |
| 203. | Howie Pollet | 6.91 | 301.0 | 1953 | |
| 204. | Hub Pruett | 6.91 | 285.3 | 1933 | |
| 205. | Nolan Ryan | 6.91 | 251.3 | 1969 | |
| 206. | Masanori Murakami | 6.91 | 235.7 | 1971 | |
| 207. | Charlie Kerfeld | 6.91 | 192.7 | 1989 | |
| 208. | Jerry Stephenson | 6.92 | 175.7 | 1971 | |
| 209. | George Brunet | 6.92 | 301.7 | 1966 | |
| 210. | Eduardo Rodriguez | 6.92 | 297.7 | 1986 | |
| 211. | Jack McDowell | 6.93 | 269.0 | 1989 | |
| 212. | Don Sutton | 6.93 | 267.7 | 1971 | |
| 213. | Frank Baumann | 6.93 | 274.0 | 1964 | |
| 214. | Masanori Murakami | 6.93 | 233.7 | 1969 | |
| 215. | Warren Spahn * | 6.93 | 342.7 | 1960 | |
| 216. | Bill Landis | 6.94 | 279.0 | 1967 | |
| 217. | Gerry Arrigo | 6.94 | 181.7 | 1965 | |
| 218. | Bob Veale | 6.94 | 251.7 | 1964 | |
| 219. | Bill Slayback | 6.94 | 294.3 | 1981 | |
| 220. | John Hiller | 6.94 | 234.7 | 1976 | |
| 221. | Kent Peterson | 6.94 | 220.3 | 1963 | |
| 222. | Danny McDevitt | 6.94 | 289.0 | 1966 | |
| 223. | Joe Presko | 6.95 | 191.7 | 1964 | |
| 224. | Ken Dayley | 6.95 | 224.0 | 1989 | |
| 225. | Duane Ward | 6.95 | 222.7 | 1986 | |
| 226. | Mike Marshall | 6.96 | 185.0 | 1978 | |
| 227. | John Hiller | 6.96 | 238.0 | 1974 | |
| 228. | Gene Conley * | 6.96 | 285.7 | 1954 | |
| 229. | Gene Conley * | 6.96 | 314.0 | 1955 | |
| 230. | Frank Baumann | 6.97 | 302.3 | 1960 | |
| 231. | Johnny Vander Meer | 6.97 | 312.7 | 1945 | |
| 232. | Steve Hamilton | 6.97 | 166.7 | 1961 | |
| 233. | Mark Langston | 6.97 | 248.0 | 1984 | |
| 234. | Sandy Koufax * | 6.97 | 308.7 | 1958 | |
| 235. | Rich Gossage | 6.97 | 204.0 | 1975 | |
| 236. | Joe Page | 6.97 | 173.0 | 1946 | |
| 237. | Tom Seaver | 6.97 | 272.3 | 1970 | |
| 238. | Rich Bordi | 6.98 | 238.7 | 1983 | |
| 239. | Tom Qualters | 6.98 | 277.3 | 1968 | |
| 240. | Sandy Koufax * | 6.98 | 322.3 | 1967 | |
| 241. | Gus Keriazakos | 6.98 | 306.7 | 1959 | |
| 242. | John Denny | 6.99 | 238.3 | 1983 | |
| 243. | Mike McQueen | 6.99 | 246.0 | 1979 | |
| 244. | Tom Underwood | 6.99 | 264.0 | 1978 | |
| 245. | Ted Gray | 6.99 | 291.0 | 1957 | |
| 246. | Howie Pollet | 6.99 | 307.7 | 1956 | |
| 247. | Joey McLaughlin | 6.99 | 213.7 | 1989 | |
| 248. | Rollie Sheldon | 6.99 | 342.3 | 1968 | |
| 249. | Jack Billingham | 7.00 | 229.0 | 1977 | |
| 250. | John Gelnar | 7.00 | 311.3 | 1968 | |
| 251. | Kent Peterson | 7.00 | 289.3 | 1950 | |
| 252. | George Brunet | 7.00 | 304.7 | 1963 | |
| 253. | Manny Sarmiento | 7.00 | 241.7 | 1986 | |
| 254. | Gerry Arrigo | 7.00 | 196.7 | 1963 | |
| 255. | Woodie Fryman | 7.00 | 169.7 | 1966 | |
| 256. | Karl Spooner | 7.00 | 303.3 | 1964 | |
| 257. | Harry Brecheen | 7.00 | 258.3 | 1946 | |
| 258. | Nolan Ryan | 7.00 | 213.3 | 1975 | |
| 259. | Dick Drott | 7.00 | 318.7 | 1960 | |
| 260. | John Hiller | 7.00 | 221.0 | 1971 | |
| 261. | Mike Torrez | 7.01 | 263.3 | 1979 | |
| 262. | Herb Score | 7.01 | 307.0 | 1967 | |
| 263. | Bill Sayles | 7.01 | 218.3 | 1942 | |
| 264. | Mike McQueen | 7.01 | 204.0 | 1984 | |
| 265. | Gene Conley * | 7.02 | 343.7 | 1962 | |
| 266. | Tom Henke | 7.02 | 175.7 | 1990 | |
| 267. | Warren Spahn * | 7.02 | 379.3 | 1957 | |
| 268. | Hub Pruett | 7.02 | 312.7 | 1931 | |
| 269. | Mark Eichhorn | 7.02 | 270.3 | 1985 | |
| 270. | Dean Stone | 7.03 | 294.7 | 1958 | |
| 271. | Roger Clemens | 7.03 | 240.7 | 1990 | |
| 272. | Bob Veale | 7.03 | 285.3 | 1966 | |
| 273. | Charlie Beamon | 7.04 | 235.3 | 1970 | |
| 274. | Pat Malone | 7.04 | 335.0 | 1938 | |
| 275. | Jim Beattie | 7.04 | 191.7 | 1980 | |
| 276. | J.R. Richard * | 7.05 | 259.3 | 1979 | |
| 277. | Johnny Antonelli | 7.05 | 316.7 | 1963 | |
| 278. | John Hiller | 7.05 | 222.0 | 1970 | |
| 279. | Bud Daley | 7.06 | 297.0 | 1965 | |
| 280. | Bo Belinsky | 7.06 | 288.0 | 1962 | |
| 281. | Ralph Lumenti | 7.06 | 237.0 | 1961 | |
| 282. | Joe Horlen | 7.07 | 328.7 | 1967 | |
| 283. | Mike Norris | 7.07 | 299.3 | 1984 | |
| 284. | Nino Espinosa | 7.07 | 163.0 | 1987 | |
| 285. | Gary Kroll | 7.07 | 208.7 | 1971 | |
| 286. | Bert Blyleven | 7.07 | 257.0 | 1984 | |
| 287. | Sam McDowell | 7.08 | 269.7 | 1969 | |
| 288. | Rich Gossage | 7.08 | 206.0 | 1974 | |
| 289. | Eduardo Rodriguez | 7.08 | 267.0 | 1982 | |
| 290. | Tom Qualters | 7.08 | 292.3 | 1967 | |
| 291. | Steve Hamilton | 7.09 | 282.0 | 1965 | |
| 292. | Rich Bordi | 7.09 | 241.3 | 1987 | |
| 293. | Joe Sambito | 7.09 | 226.0 | 1985 | |
| 294. | Tom Underwood | 7.09 | 259.0 | 1984 | |
| 295. | Ted Gray | 7.09 | 278.0 | 1952 | |
| 296. | Rich Bordi | 7.09 | 243.7 | 1984 | |
| 297. | J.R. Richard * | 7.09 | 222.0 | 1981 | |
| 298. | Bill Sayles | 7.10 | 291.7 | 1941 | |
| 299. | Randy Myers | 7.10 | 187.7 | 1988 | |
| 300. | Carl Scheib | 7.10 | 333.3 | 1954 |
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