+ - Indicates Hall of Famer. Bold indicates active player.
Statistic Description: Range Factor per 9 Inn 9 * (Putouts + Assists) / Innings Played
Minimum of 1000 IP, 3000 PA, 500 games (fielding), 200 stolen base attempts (catchers) or 80 stolen base attempts (baserunners only since 1951) or 100 decisions for career and active leaderboards for rate statistics.
This statistic is computed from play-by-play data which is only complete from 1974 to the present. From 1945-1973, the data is incomplete, though for most seasons only less than 20 games per season total are missing. Please see our page on data coverage for a full view of the data used to create these lists.
| Rank | Player (yrs, age) | Range Factor/9Inn as P | Throws |
|---|---|---|---|
| 1. | Roger McDowell (12) | 3.180 | R |
| 2. | Javier Lopez (11, 35) | 3.175 | L |
| 3. | Greg Maddux (23) | 3.127 | R |
| 4. | Dan Quisenberry (12) | 3.114 | R |
| 5. | Juan Agosto (13) | 3.104 | L |
| 6. | Greg Minton (16) | 2.834 | R |
| 7. | Kenny Rogers (20) | 2.728 | L |
| 8. | Gene Garber (19) | 2.638 | R |
| 9. | Dale Murray (12) | 2.633 | R |
| 10. | Kent Tekulve (16) | 2.625 | R |
| 11. | Orel Hershiser (18) | 2.590 | R |
| 12. | Mariano Rivera (19, 43) | 2.568 | R |
| 13. | Rick Reuschel (19) | 2.540 | R |
| 14. | Mike Myers (13) | 2.526 | L |
| Bob Stanley (13) | 2.526 | R | |
| 16. | Luis Ayala (9, 35) | 2.472 | R |
| 17. | Ray King (10) | 2.453 | L |
| 18. | Danny Graves (11) | 2.450 | R |
| 19. | Mark Eichhorn (11) | 2.449 | R |
| 20. | Chad Bradford (12) | 2.443 | R |
| 21. | Dennis Martinez (23) | 2.435 | R |
| 22. | J.C. Romero (14, 37) | 2.422 | L |
| 23. | Jason Grimsley (15) | 2.392 | R |
| 24. | Jeff Shaw (12) | 2.377 | R |
| Jamey Wright (18, 38) | 2.377 | R | |
| 26. | Joe Beimel (11) | 2.374 | L |
| 27. | Rheal Cormier (16) | 2.365 | L |
| Dennis Lamp (16) | 2.365 | R | |
| 29. | Scott Downs (12, 37) | 2.358 | L |
| 30. | Doug Brocail (15) | 2.342 | R |
| 31. | Livan Hernandez (17) | 2.292 | R |
| 32. | Tom Glavine (22) | 2.280 | L |
| 33. | Derek Lowe (17, 40) | 2.271 | R |
| 34. | Terry Adams (11) | 2.246 | R |
| 35. | Larry Andersen (17) | 2.242 | R |
| 36. | Mike Morgan (22) | 2.208 | R |
| 37. | Rick Honeycutt (21) | 2.196 | L |
| 38. | Tippy Martinez (14) | 2.191 | L |
| 39. | Turk Wendell (11) | 2.161 | R |
| 40. | Mike Timlin (18) | 2.160 | R |
| 41. | Jeremy Affeldt (12, 34) | 2.156 | L |
| 42. | Jeff Russell (14) | 2.152 | R |
| 43. | Bill Campbell (15) | 2.148 | R |
| 44. | John Franco (21) | 2.146 | L |
| 45. | Tom Hume (11) | 2.113 | R |
| 46. | Rich Rodriguez (13) | 2.093 | L |
| 47. | Tony Fossas (12) | 2.079 | L |
| 48. | Danys Baez (10) | 2.066 | R |
| 49. | Jesse Crain (10, 31) | 2.051 | R |
| Julian Tavarez (17) | 2.051 | R | |
| Rank | Player (yrs, age) | Range Factor/9Inn as P | Throws |
| 51. | Mike DeJean (10) | 2.050 | R |
| 52. | Jamie Moyer (25) | 2.039 | L |
| 53. | Jeff Fassero (16) | 2.036 | L |
| 54. | Bruce Sutter+ (12) | 2.030 | R |
| 55. | Shigetoshi Hasegawa (9) | 2.024 | R |
| 56. | Greg Harris (15) | 2.018 | R |
| 57. | Shawn Camp (10, 37) | 1.995 | R |
| 58. | Chad Qualls (10, 34) | 1.990 | R |
| 59. | Phil Niekro+ (24) | 1.973 | R |
| 60. | Heathcliff Slocumb (10) | 1.968 | R |
| 61. | Bob Wickman (15) | 1.963 | R |
| 62. | Jeff Montgomery (13) | 1.958 | R |
| 63. | Willie Hernandez (13) | 1.956 | L |
| 64. | Steve Kline (11) | 1.952 | L |
| 65. | John Smoltz (21) | 1.951 | R |
| 66. | Brandon Lyon (12, 33) | 1.944 | R |
| Scott Schoeneweis (12) | 1.944 | L | |
| 68. | Tom Gordon (21) | 1.934 | R |
| 69. | Doug Bair (15) | 1.930 | R |
| 70. | Trever Miller (13) | 1.926 | L |
| 71. | Rick Aguilera (16) | 1.924 | R |
| Charlie Hough (25) | 1.924 | R | |
| 73. | Ron Villone (15) | 1.919 | L |
| 74. | Ryan Dempster (16, 36) | 1.912 | R |
| 75. | Mike Fetters (16) | 1.909 | R |
| 76. | Fernando Rodney (11, 36) | 1.906 | R |
| 77. | Gary Lavelle (13) | 1.900 | L |
| 78. | Jack Morris (18) | 1.883 | R |
| 79. | Jay Howell (15) | 1.865 | R |
| 80. | Frank Tanana (21) | 1.858 | L |
| 81. | Bob Welch (17) | 1.854 | R |
| 82. | Curt Leskanic (11) | 1.844 | R |
| 83. | Andy Pettitte (18, 41) | 1.842 | L |
| 84. | Darren Holmes (13) | 1.840 | R |
| Jason Isringhausen (16) | 1.840 | R | |
| Steve Reed (14) | 1.840 | R | |
| 87. | Mike Mussina (18) | 1.839 | R |
| 88. | Rob Murphy (11) | 1.834 | L |
| 89. | Frank DiPino (12) | 1.826 | L |
| 90. | Rollie Fingers+ (17) | 1.824 | R |
| 91. | Scott Radinsky (11) | 1.812 | L |
| 92. | Dennys Reyes (15, 36) | 1.808 | L |
| 93. | LaTroy Hawkins (19, 40) | 1.806 | R |
| 94. | Rick White (12) | 1.803 | R |
| 95. | Jim Gott (14) | 1.800 | R |
| 96. | Miguel Batista (18, 42) | 1.799 | R |
| 97. | Jose Mesa (19) | 1.796 | R |
| 98. | Jay Powell (11) | 1.759 | R |
| 99. | Paul Quantrill (14) | 1.756 | R |
| 100. | Heath Bell (10, 35) | 1.744 | R |
| Rank | Player (yrs, age) | Range Factor/9Inn as P | Throws |
| Terry Mulholland (20) | 1.744 | L | |
| 102. | Elias Sosa (12) | 1.743 | R |
| 103. | Dave Burba (15) | 1.736 | R |
| 104. | Bert Blyleven+ (22) | 1.731 | R |
| 105. | Jesse Orosco (24) | 1.730 | L |
| 106. | Graeme Lloyd (10) | 1.722 | L |
| 107. | Steve Farr (11) | 1.714 | R |
| 108. | Mike Stanton (19) | 1.697 | L |
| 109. | Mike Henneman (10) | 1.695 | R |
| 110. | Doug Jones (16) | 1.691 | R |
| 111. | Michael Jackson (17) | 1.689 | R |
| 112. | Antonio Alfonseca (11) | 1.688 | R |
| 113. | Mel Rojas (10) | 1.687 | R |
| 114. | Mike Flanagan (18) | 1.686 | L |
| 115. | Sparky Lyle (16) | 1.678 | L |
| 116. | Norm Charlton (13) | 1.671 | L |
| 117. | Joe Boever (12) | 1.670 | R |
| 118. | Darren Oliver (20, 42) | 1.664 | L |
| 119. | Jeff Nelson (15) | 1.663 | R |
| 120. | Gregg Olson (14) | 1.661 | R |
| 121. | Braden Looper (12) | 1.653 | R |
| 122. | Craig Lefferts (12) | 1.650 | L |
| 123. | Dick Tidrow (13) | 1.640 | R |
| 124. | Roger Clemens (24) | 1.638 | R |
| 125. | Tim Worrell (14) | 1.636 | R |
| 126. | Danny Darwin (21) | 1.635 | R |
| 127. | Tug McGraw (19) | 1.632 | L |
| 128. | J.J. Putz (11, 36) | 1.626 | R |
| 129. | Ron Reed (19) | 1.624 | R |
| 130. | Chuck McElroy (13) | 1.619 | L |
| 131. | Hector Carrasco (12) | 1.611 | R |
| Ryan Franklin (12) | 1.611 | R | |
| 133. | Jason Frasor (10, 35) | 1.601 | R |
| 134. | Guillermo Mota (14) | 1.597 | R |
| 135. | Rod Beck (13) | 1.582 | R |
| 136. | Mike Trombley (11) | 1.572 | R |
| 137. | Dennis Eckersley+ (24) | 1.570 | R |
| David Wells (21) | 1.570 | L | |
| 139. | Matt Herges (11) | 1.563 | R |
| 140. | Francisco Cordero (14) | 1.561 | R |
| 141. | Tim Wakefield (19) | 1.551 | R |
| 142. | Matt Thornton (10, 36) | 1.544 | L |
| 143. | Greg Swindell (17) | 1.543 | L |
| 144. | Ricardo Rincon (11) | 1.542 | L |
| 145. | Don Robinson (15) | 1.535 | R |
| 146. | Todd Jones (16) | 1.528 | R |
| 147. | Mark Guthrie (15) | 1.517 | L |
| 148. | Paul Assenmacher (14) | 1.515 | L |
| Jason Christiansen (11) | 1.515 | L | |
| 150. | Roberto Hernandez (17) | 1.512 | R |
| Rank | Player (yrs, age) | Range Factor/9Inn as P | Throws |
| 151. | John Grabow (9) | 1.511 | L |
| 152. | Bob McClure (19) | 1.507 | L |
| 153. | Mark Wohlers (12) | 1.496 | R |
| 154. | Dave Veres (10) | 1.491 | R |
| 155. | Ricky Bottalico (12) | 1.489 | R |
| 156. | Kyle Farnsworth (15, 37) | 1.481 | R |
| Alejandro Pena (15) | 1.481 | R | |
| 158. | Dave Stewart (16) | 1.468 | R |
| 159. | Doug Henry (11) | 1.460 | R |
| 160. | Mike Remlinger (14) | 1.454 | L |
| 161. | Keith Foulke (11) | 1.453 | R |
| Todd Worrell (11) | 1.453 | R | |
| 163. | Dan Spillner (12) | 1.435 | R |
| 164. | Dave Smith (13) | 1.434 | R |
| 165. | Kent Mercker (18) | 1.433 | L |
| 166. | Dan Schatzeder (15) | 1.428 | L |
| 167. | David Weathers (19) | 1.426 | R |
| 168. | Jamie Walker (10) | 1.425 | L |
| 169. | Robb Nen (10) | 1.422 | R |
| 170. | John Candelaria (19) | 1.415 | L |
| Mark Davis (15) | 1.415 | L | |
| 172. | Bob Patterson (13) | 1.414 | L |
| 173. | Steve Bedrosian (14) | 1.406 | R |
| 174. | Ted Power (13) | 1.397 | R |
| 175. | Dennis Cook (15) | 1.388 | L |
| 176. | Alan Embree (16) | 1.384 | L |
| 177. | Rudy Seanez (17) | 1.368 | R |
| 178. | Luis Vizcaino (11, 38) | 1.366 | R |
| 179. | Buddy Groom (14) | 1.348 | L |
| 180. | Jeff Brantley (14) | 1.341 | R |
| 181. | Nolan Ryan+ (27) | 1.331 | R |
| 182. | Curt Schilling (20) | 1.325 | R |
| 183. | Dan Wheeler (13, 35) | 1.320 | R |
| 184. | Scott Sullivan (10) | 1.318 | R |
| 185. | Damaso Marte (11) | 1.304 | L |
| 186. | Ron Mahay (15) | 1.299 | L |
| 187. | Dan Miceli (14) | 1.284 | R |
| 188. | Francisco Rodriguez (11, 31) | 1.261 | R |
| 189. | Rich Gossage+ (22) | 1.259 | R |
| 190. | Chuck Finley (17) | 1.258 | L |
| 191. | Tom Henke (14) | 1.254 | R |
| 192. | Bob Howry (13) | 1.246 | R |
| 193. | Joe Nathan (13, 38) | 1.235 | R |
| Arthur Rhodes (20) | 1.235 | L | |
| 195. | Trevor Hoffman (18) | 1.231 | R |
| 196. | Randy Myers (14) | 1.211 | L |
| 197. | Brian Fuentes (12) | 1.203 | L |
| 198. | Jon Rauch (11, 34) | 1.197 | R |
| 199. | Dave Righetti (16) | 1.186 | L |
| Billy Wagner (16) | 1.186 | L | |
| Rank | Player (yrs, age) | Range Factor/9Inn as P | Throws |
| 201. | Scott Eyre (13) | 1.178 | L |
| 202. | Randy Johnson (22) | 1.171 | L |
| 203. | Scott Linebrink (12) | 1.165 | R |
| 204. | Mitch Williams (11) | 1.159 | L |
| 205. | Lee Smith (18) | 1.138 | R |
| 206. | Octavio Dotel (15, 39) | 1.136 | R |
| 207. | Russ Springer (18) | 1.125 | R |
| 208. | Felix Heredia (10) | 1.119 | L |
| 209. | Eddie Guardado (17) | 1.086 | L |
| 210. | Felix Rodriguez (11) | 1.074 | R |
| 211. | Ugueth Urbina (11) | 1.071 | R |
| 212. | Kevin Gregg (11, 35) | 1.069 | R |
| 213. | Stan Belinda (12) | 1.064 | R |
| 214. | Eric Plunk (14) | 1.063 | R |
| 215. | Brad Lidge (11) | 1.059 | R |
| 216. | B.J. Ryan (11) | 1.040 | L |
| 217. | John Wetteland (12) | 1.024 | R |
| 218. | Justin Speier (12) | 0.987 | R |
| 219. | Jeff Reardon (16) | 0.946 | R |
| 220. | Dan Plesac (18) | 0.915 | L |
| 221. | Jose Valverde (11, 35) | 0.889 | R |
| 222. | Armando Benitez (15) | 0.820 | R |
| 223. | Rafael Betancourt (11, 38) | 0.739 | R |
| 224. | Troy Percival (14) | 0.660 | R |
Note that seasons prior to 1876 are not included in single-season marks, but are included in career marks.