+ - 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. | Javier Lopez (10, 34) | 3.205 | L |
| 2. | Roger McDowell (12) | 3.180 | R |
| 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 |
| Mariano Rivera (18, 42) | 2.590 | R | |
| 13. | Rick Reuschel (19) | 2.540 | R |
| 14. | Mike Myers (13) | 2.526 | L |
| Bob Stanley (13) | 2.526 | R | |
| 16. | Ray King (10) | 2.453 | L |
| 17. | Danny Graves (11) | 2.450 | R |
| 18. | Mark Eichhorn (11) | 2.449 | R |
| 19. | Chad Bradford (12) | 2.443 | R |
| 20. | Dennis Martinez (23) | 2.435 | R |
| 21. | J.C. Romero (14, 36) | 2.422 | L |
| 22. | Jason Grimsley (15) | 2.392 | R |
| 23. | Jeff Shaw (12) | 2.377 | R |
| 24. | Joe Beimel (11) | 2.374 | L |
| 25. | Jamey Wright (17, 37) | 2.368 | R |
| 26. | Rheal Cormier (16) | 2.365 | L |
| Dennis Lamp (16) | 2.365 | R | |
| 28. | Doug Brocail (15) | 2.342 | R |
| 29. | Livan Hernandez (17, 37) | 2.292 | R |
| 30. | Tom Glavine (22) | 2.280 | L |
| 31. | Derek Lowe (16, 39) | 2.275 | R |
| 32. | Terry Adams (11) | 2.246 | R |
| 33. | Larry Andersen (17) | 2.242 | R |
| 34. | Mike Morgan (22) | 2.208 | R |
| 35. | Rick Honeycutt (21) | 2.196 | L |
| 36. | Tippy Martinez (14) | 2.191 | L |
| 37. | Turk Wendell (11) | 2.161 | R |
| 38. | Mike Timlin (18) | 2.160 | R |
| 39. | Jeff Russell (14) | 2.152 | R |
| 40. | Bill Campbell (15) | 2.148 | R |
| 41. | John Franco (21) | 2.146 | L |
| 42. | Jeremy Affeldt (11, 33) | 2.133 | L |
| 43. | Tom Hume (11) | 2.113 | R |
| 44. | Rich Rodriguez (13) | 2.093 | L |
| 45. | Tony Fossas (12) | 2.079 | L |
| 46. | Danys Baez (10) | 2.066 | R |
| 47. | Julian Tavarez (17) | 2.051 | R |
| 48. | Mike DeJean (10) | 2.050 | R |
| 49. | Jamie Moyer (25, 49) | 2.039 | L |
| 50. | Jeff Fassero (16) | 2.036 | L |
| Rank | Player (yrs, age) | Range Factor/9Inn as P | Throws |
| 51. | Bruce Sutter+ (12) | 2.030 | R |
| 52. | Shigetoshi Hasegawa (9) | 2.024 | R |
| 53. | Greg Harris (15) | 2.018 | R |
| 54. | Shawn Camp (9, 36) | 1.988 | R |
| 55. | Phil Niekro+ (24) | 1.973 | R |
| 56. | Heathcliff Slocumb (10) | 1.968 | R |
| 57. | Bob Wickman (15) | 1.963 | R |
| 58. | Jeff Montgomery (13) | 1.958 | R |
| 59. | Willie Hernandez (13) | 1.956 | L |
| 60. | Steve Kline (11) | 1.952 | L |
| 61. | John Smoltz (21) | 1.951 | R |
| 62. | Scott Schoeneweis (12) | 1.944 | L |
| 63. | Tom Gordon (21) | 1.934 | R |
| Brandon Lyon (11, 32) | 1.934 | R | |
| 65. | Doug Bair (15) | 1.930 | R |
| 66. | Ryan Dempster (15, 35) | 1.929 | R |
| 67. | Trever Miller (13) | 1.926 | L |
| 68. | Rick Aguilera (16) | 1.924 | R |
| Charlie Hough (25) | 1.924 | R | |
| 70. | Chad Qualls (9, 33) | 1.920 | R |
| 71. | Ron Villone (15) | 1.919 | L |
| 72. | Mike Fetters (16) | 1.909 | R |
| 73. | Gary Lavelle (13) | 1.900 | L |
| 74. | Jack Morris (18) | 1.883 | R |
| 75. | Jay Howell (15) | 1.865 | R |
| 76. | Frank Tanana (21) | 1.858 | L |
| 77. | Bob Welch (17) | 1.854 | R |
| 78. | Curt Leskanic (11) | 1.844 | R |
| 79. | Darren Holmes (13) | 1.840 | R |
| Jason Isringhausen (16, 39) | 1.840 | R | |
| Steve Reed (14) | 1.840 | R | |
| 82. | Mike Mussina (18) | 1.839 | R |
| 83. | Rob Murphy (11) | 1.834 | L |
| 84. | Andy Pettitte (17, 40) | 1.828 | L |
| 85. | Frank DiPino (12) | 1.826 | L |
| 86. | Rollie Fingers+ (17) | 1.824 | R |
| 87. | LaTroy Hawkins (18, 39) | 1.816 | R |
| 88. | Scott Radinsky (11) | 1.812 | L |
| 89. | Dennys Reyes (15) | 1.808 | L |
| 90. | Rick White (12) | 1.803 | R |
| 91. | Jim Gott (14) | 1.800 | R |
| 92. | Miguel Batista (18, 41) | 1.799 | R |
| 93. | Jose Mesa (19) | 1.796 | R |
| 94. | Jay Powell (11) | 1.759 | R |
| 95. | Paul Quantrill (14) | 1.756 | R |
| 96. | Terry Mulholland (20) | 1.744 | L |
| 97. | Elias Sosa (12) | 1.743 | R |
| 98. | Dave Burba (15) | 1.736 | R |
| 99. | Heath Bell (9, 34) | 1.732 | R |
| 100. | Bert Blyleven+ (22) | 1.731 | R |
| Rank | Player (yrs, age) | Range Factor/9Inn as P | Throws |
| 101. | Jesse Orosco (24) | 1.730 | L |
| 102. | Graeme Lloyd (10) | 1.722 | L |
| 103. | Steve Farr (11) | 1.714 | R |
| 104. | Mike Stanton (19) | 1.697 | L |
| 105. | Mike Henneman (10) | 1.695 | R |
| 106. | Doug Jones (16) | 1.691 | R |
| 107. | Michael Jackson (17) | 1.689 | R |
| 108. | Antonio Alfonseca (11) | 1.688 | R |
| 109. | Mel Rojas (10) | 1.687 | R |
| 110. | Mike Flanagan (18) | 1.686 | L |
| 111. | Sparky Lyle (16) | 1.678 | L |
| 112. | Norm Charlton (13) | 1.671 | L |
| 113. | Joe Boever (12) | 1.670 | R |
| 114. | Jeff Nelson (15) | 1.663 | R |
| 115. | Gregg Olson (14) | 1.661 | R |
| 116. | Darren Oliver (19, 41) | 1.654 | L |
| 117. | Braden Looper (12) | 1.653 | R |
| 118. | Craig Lefferts (12) | 1.650 | L |
| 119. | Dick Tidrow (13) | 1.640 | R |
| 120. | Roger Clemens (24) | 1.638 | R |
| 121. | Tim Worrell (14) | 1.636 | R |
| 122. | Danny Darwin (21) | 1.635 | R |
| 123. | Tug McGraw (19) | 1.632 | L |
| 124. | Ron Reed (19) | 1.624 | R |
| 125. | Jason Frasor (9, 34) | 1.620 | R |
| 126. | Chuck McElroy (13) | 1.619 | L |
| 127. | J.J. Putz (10, 35) | 1.614 | R |
| 128. | Hector Carrasco (12, 42) | 1.611 | R |
| Ryan Franklin (12) | 1.611 | R | |
| 130. | Guillermo Mota (14, 38) | 1.597 | R |
| 131. | Rod Beck (13) | 1.582 | R |
| 132. | Mike Trombley (11) | 1.572 | R |
| 133. | Dennis Eckersley+ (24) | 1.570 | R |
| David Wells (21) | 1.570 | L | |
| 135. | Matt Herges (11) | 1.563 | R |
| 136. | Francisco Cordero (14, 37) | 1.561 | R |
| 137. | Tim Wakefield (19) | 1.551 | R |
| 138. | Greg Swindell (17) | 1.543 | L |
| 139. | Ricardo Rincon (11, 42) | 1.542 | L |
| 140. | Don Robinson (15) | 1.535 | R |
| 141. | Todd Jones (16) | 1.528 | R |
| 142. | Mark Guthrie (15) | 1.517 | L |
| 143. | Paul Assenmacher (14) | 1.515 | L |
| Jason Christiansen (11) | 1.515 | L | |
| 145. | Roberto Hernandez (17) | 1.512 | R |
| 146. | John Grabow (9) | 1.511 | L |
| 147. | Bob McClure (19) | 1.507 | L |
| 148. | Mark Wohlers (12) | 1.496 | R |
| 149. | Matt Thornton (9, 35) | 1.491 | L |
| Dave Veres (10) | 1.491 | R | |
| Rank | Player (yrs, age) | Range Factor/9Inn as P | Throws |
| 151. | Ricky Bottalico (12) | 1.489 | R |
| 152. | Kyle Farnsworth (14, 36) | 1.484 | R |
| 153. | Alejandro Pena (15) | 1.481 | R |
| 154. | Dave Stewart (16) | 1.468 | R |
| 155. | Doug Henry (11) | 1.460 | R |
| 156. | Mike Remlinger (14) | 1.454 | L |
| 157. | Keith Foulke (11) | 1.453 | R |
| Todd Worrell (11) | 1.453 | R | |
| 159. | Dan Spillner (12) | 1.435 | R |
| 160. | Dave Smith (13) | 1.434 | R |
| 161. | Kent Mercker (18) | 1.433 | L |
| 162. | Dan Schatzeder (15) | 1.428 | L |
| 163. | David Weathers (19) | 1.426 | R |
| 164. | Jamie Walker (10) | 1.425 | L |
| 165. | Robb Nen (10) | 1.422 | R |
| 166. | John Candelaria (19) | 1.415 | L |
| Mark Davis (15) | 1.415 | L | |
| 168. | Bob Patterson (13) | 1.414 | L |
| 169. | Steve Bedrosian (14) | 1.406 | R |
| 170. | Ted Power (13) | 1.397 | R |
| 171. | Dennis Cook (15) | 1.388 | L |
| 172. | Alan Embree (16) | 1.384 | L |
| 173. | Rudy Seanez (17) | 1.368 | R |
| 174. | Luis Vizcaino (11) | 1.366 | R |
| 175. | Buddy Groom (14) | 1.348 | L |
| 176. | Jeff Brantley (14) | 1.341 | R |
| 177. | Nolan Ryan+ (27) | 1.331 | R |
| 178. | Curt Schilling (20) | 1.325 | R |
| 179. | Dan Wheeler (13, 34) | 1.320 | R |
| 180. | Scott Sullivan (10) | 1.318 | R |
| 181. | Damaso Marte (11) | 1.304 | L |
| 182. | Ron Mahay (15, 41) | 1.299 | L |
| 183. | Dan Miceli (14) | 1.284 | R |
| 184. | Francisco Rodriguez (11, 30) | 1.261 | R |
| 185. | Rich Gossage+ (22) | 1.259 | R |
| 186. | Chuck Finley (17) | 1.258 | L |
| 187. | Tom Henke (14) | 1.254 | R |
| 188. | Bob Howry (13) | 1.246 | R |
| 189. | Arthur Rhodes (20) | 1.235 | L |
| 190. | Trevor Hoffman (18) | 1.231 | R |
| 191. | Joe Nathan (12, 37) | 1.213 | R |
| 192. | Randy Myers (14) | 1.211 | L |
| 193. | Brian Fuentes (12, 36) | 1.203 | L |
| 194. | Dave Righetti (16) | 1.186 | L |
| Billy Wagner (16) | 1.186 | L | |
| 196. | Scott Eyre (13) | 1.178 | L |
| 197. | Randy Johnson (22) | 1.171 | L |
| 198. | Scott Linebrink (12) | 1.165 | R |
| 199. | Mitch Williams (11) | 1.159 | L |
| 200. | Jon Rauch (10, 33) | 1.152 | R |
| Rank | Player (yrs, age) | Range Factor/9Inn as P | Throws |
| 201. | Lee Smith (18) | 1.138 | R |
| 202. | Octavio Dotel (14, 38) | 1.132 | R |
| 203. | Russ Springer (18) | 1.125 | R |
| 204. | Felix Heredia (10) | 1.119 | L |
| 205. | Eddie Guardado (17) | 1.086 | L |
| 206. | Felix Rodriguez (11) | 1.074 | R |
| 207. | Kevin Gregg (10, 34) | 1.071 | R |
| Ugueth Urbina (11) | 1.071 | R | |
| 209. | Stan Belinda (12) | 1.064 | R |
| 210. | Eric Plunk (14) | 1.063 | R |
| 211. | Brad Lidge (11, 35) | 1.059 | R |
| 212. | B.J. Ryan (11) | 1.040 | L |
| 213. | John Wetteland (12) | 1.024 | R |
| 214. | Justin Speier (12) | 0.987 | R |
| 215. | Jeff Reardon (16) | 0.946 | R |
| 216. | Dan Plesac (18) | 0.915 | L |
| 217. | Jose Valverde (10, 34) | 0.884 | R |
| 218. | Armando Benitez (15) | 0.820 | R |
| 219. | Rafael Betancourt (10, 37) | 0.714 | R |
| 220. | 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.