I already ranked The Top 161* Oakland A's Position Players of All-Time so might as well do a pitcher list as well. Like the position players list I came up with the revolutionary idea of averaging of WARs of FanGraphs and Baseball-Reference which is listed as aWAR in the chart. As you may know the main difference between fWAR and bWAR is that FanGraph uses FIP which can lead to some noticeable differences and the two metrics disagree on who is the best pitcher in Oakland A's history.
As for the criteria of who makes the list, a pitcher must have thrown at least 162 innings with Oakland (sorry Lenny DiNardo fans). I threw in some additional data for context, "aRAR" is the average runs above replacement between FanGraphs and Basball-Reference.
Player | Rank | IP | bWAR | fWAR | aWAR | aRAR | ERA+ | FIP |
Vida Blue | 1 | 1945.2 | 29 | 36.2 | 32.6 | 288 | 118 | 3.13 |
Tim Hudson | 2 | 1240.2 | 31 | 27.6 | 29.3 | 304 | 136 | 3.63 |
Barry Zito | 3 | 1437.1 | 30.6 | 23.8 | 27.2 | 285 | 124 | 4.21 |
Dave Stewart | 4 | 1717.1 | 18.9 | 22.8 | 20.9 | 206 | 103 | 3.85 |
Catfish Hunter | 5 | 1887 | 20.8 | 19.8 | 20.3 | 178 | 109 | 3.56 |
Mark Mulder | 6 | 1003 | 19.7 | 17.7 | 18.7 | 196 | 114 | 3.99 |
Dennis Eckersley | 7 | 637 | 15.9 | 19.3 | 17.6 | 161 | 145 | 2.44 |
Rollie Fingers | 8 | 1016 | 12.1 | 16 | 14.1 | 124 | 117 | 2.93 |
Ken Holtzman | 9 | 1084.1 | 11 | 16.4 | 13.7 | 126 | 115 | 3.27 |
Rick Langford | 10 | 1468 | 11.4 | 15.2 | 13.3 | 129 | 96 | 4.07 |
Rich Harden | 11 | 624.1 | 13 | 13 | 13.0 | 134 | 120 | 3.62 |
Dan Haren | 12 | 662.2 | 11.4 | 12.2 | 11.8 | 125 | 120 | 3.90 |
Sonny Gray | 13 | 705 | 11.4 | 12 | 11.7 | 114 | 114 | 3.56 |
Sean Manaea | 14 | 727 | 12.1 | 11.1 | 11.6 | 118 | 107 | 3.96 |
Joe Blanton | 15 | 760.2 | 8.5 | 12.2 | 10.4 | 111 | 101 | 4.04 |
Bob Welch | 16 | 1271.1 | 10.8 | 9.1 | 10.0 | 98 | 97 | 4.35 |
Brett Anderson | 17 | 707 | 8.4 | 11.3 | 9.9 | 102 | 107 | 3.88 |
Mike Moore | 18 | 874 | 9.3 | 10.4 | 9.9 | 94 | 105 | 3.85 |
Chris Bassitt | 19 | 526 | 9.5 | 8.8 | 9.2 | 94 | 121 | 3.89 |
Justin Duchscherer | 20 | 440 | 10.7 | 6.2 | 8.5 | 87 | 153 | 3.73 |
Mike Norris | 21 | 1124.1 | 8.1 | 8.5 | 8.3 | 81 | 96 | 4.27 |
Kenny Rogers | 22 | 358 | 9.3 | 6.9 | 8.1 | 85 | 128 | 4.01 |
Trevor Cahill | 23 | 693 | 9.5 | 6.4 | 8.0 | 82 | 107 | 4.35 |
Steve Ontiveros | 24 | 597.2 | 7.5 | 8 | 7.8 | 84 | 112 | 3.96 |
Bartolo Colon | 25 | 342.2 | 8.3 | 6.6 | 7.5 | 71 | 130 | 3.49 |
Steve McCatty | 26 | 1188.1 | 9.3 | 5.2 | 7.3 | 71 | 95 | 4.55 |
Gil Heredia | 27 | 551.1 | 7.2 | 7.1 | 7.2 | 79 | 100 | 4.68 |
Liam Hendriks | 28 | 263 | 6.1 | 7.6 | 6.9 | 66 | 137 | 2.59 |
Gio Gonzalez | 29 | 535.1 | 6.7 | 6.9 | 6.8 | 66 | 105 | 4.06 |
Cory Lidle | 30 | 380 | 7 | 6.3 | 6.7 | 70 | 116 | 3.97 |
Dallas Braden | 31 | 491.1 | 5.1 | 8.2 | 6.7 | 67 | 101 | 3.99 |
Frankie Montas | 32 | 433 | 5.6 | 7.6 | 6.6 | 67 | 109 | 3.81 |
Matt Keough | 33 | 1060.1 | 6.1 | 7 | 6.6 | 63 | 91 | 4.44 |
Huston Street | 34 | 269 | 5.8 | 6.6 | 6.2 | 65 | 150 | 2.90 |
Sean Doolittle | 35 | 253 | 4.9 | 7.3 | 6.1 | 58 | 127 | 2.45 |
Blue Moon Odom | 36 | 1202.2 | 4.3 | 7.6 | 6.0 | 48 | 95 | 3.80 |
Brandon McCarthy | 37 | 281.2 | 5.4 | 6.4 | 5.9 | 56 | 120 | 3.22 |
Jarrod Parker | 38 | 378.1 | 6.1 | 5 | 5.6 | 56 | 104 | 3.94 |
Scott Kazmir | 39 | 300 | 5.1 | 5.8 | 5.5 | 52 | 121 | 3.28 |
Andrew Bailey | 40 | 174 | 6.4 | 4.4 | 5.4 | 50 | 205 | 2.74 |
Ron Darling | 41 | 723.1 | 3.4 | 7.3 | 5.4 | 57 | 88 | 4.46 |
Chuck Dobson | 42 | 919 | 2.3 | 8.2 | 5.3 | 45 | 91 | 3.70 |
Billy Taylor | 43 | 295.2 | 4.8 | 5.6 | 5.2 | 56 | 121 | 3.56 |
Blake Treinen | 44 | 177 | 5.3 | 4.3 | 4.8 | 41 | 173 | 3.19 |
Jim Nash | 45 | 344 | 4.7 | 4.6 | 4.7 | 36 | 109 | 3.12 |
Paul Lindblad | 46 | 629.2 | 5.6 | 3.6 | 4.6 | 45 | 115 | 3.47 |
Mike Torrez | 47 | 295 | 5.3 | 3.5 | 4.4 | 37 | 119 | 3.66 |
Kendall Graveman | 48 | 441.1 | 5.5 | 3.3 | 4.4 | 44 | 93 | 4.58 |
Tommy Milone | 49 | 442.2 | 3.8 | 4.9 | 4.4 | 45 | 100 | 4.17 |
Grant Balfour | 50 | 199.1 | 5.8 | 2.8 | 4.3 | 39 | 156 | 3.40 |
Diego Segui | 51 | 414 | 5.2 | 3.2 | 4.2 | 37 | 118 | 3.51 |
Brad Ziegler | 52 | 231.1 | 5.8 | 2.4 | 4.1 | 42 | 169 | 3.47 |
Chad Bradford | 53 | 248 | 4.9 | 3.1 | 4.0 | 42 | 133 | 3.68 |
Rick Honeycutt | 54 | 406.1 | 4.6 | 3.3 | 4.0 | 39 | 126 | 3.67 |
Ryan Cook | 55 | 195 | 4.3 | 3.5 | 3.9 | 36 | 140 | 2.98 |
Bobby Witt | 56 | 387.1 | 3.4 | 4.4 | 3.9 | 41 | 94 | 4.44 |
A.J. Griffin | 57 | 282.1 | 4.8 | 2.9 | 3.9 | 40 | 108 | 4.34 |
Yusmeiro Petit | 58 | 275.2 | 5.5 | 2.1 | 3.8 | 40 | 137 | 4.06 |
Brian Kingman | 59 | 547 | 2.3 | 5.3 | 3.8 | 39 | 93 | 4.17 |
Todd Burns | 60 | 291 | 5.3 | 2.2 | 3.8 | 35 | 134 | 3.75 |
Jeff Tam | 61 | 200.2 | 4.4 | 2.9 | 3.7 | 39 | 138 | 3.61 |
Jesse Chavez | 62 | 363.2 | 2.5 | 4.7 | 3.6 | 37 | 96 | 3.76 |
Ariel Prieto | 63 | 348.2 | 3.2 | 3.9 | 3.6 | 42 | 96 | 4.75 |
Curt Young | 64 | 1039.1 | 3.8 | 3.3 | 3.6 | 36 | 89 | 4.72 |
Jason Isringhausen | 65 | 165.2 | 4.1 | 2.9 | 3.5 | 37 | 149 | 3.58 |
Jim Corsi | 66 | 222.1 | 5.6 | 1.4 | 3.5 | 38 | 157 | 4.01 |
Storm Davis | 67 | 464 | 3 | 3.6 | 3.3 | 34 | 90 | 4.14 |
Mike Fiers | 68 | 306 | 4.3 | 2.2 | 3.3 | 35 | 104 | 5.08 |
Jim Mecir | 69 | 250.2 | 2.8 | 3.6 | 3.2 | 37 | 114 | 3.65 |
Bob Lacey | 70 | 368.2 | 4.5 | 1.8 | 3.2 | 32 | 114 | 3.90 |
Doug Jones | 71 | 177.1 | 3.7 | 2.5 | 3.1 | 35 | 125 | 3.78 |
Todd Stottlemyre | 72 | 209.2 | 2.1 | 4.1 | 3.1 | 33 | 95 | 3.99 |
Mike Oquist | 73 | 423.1 | 2.5 | 3.7 | 3.1 | 36 | 80 | 4.94 |
Stan Bahnsen | 74 | 265 | 3 | 3 | 3.0 | 27 | 100 | 3.58 |
Jimmy Haynes | 75 | 409.2 | 2.2 | 3.8 | 3.0 | 33 | 84 | 4.98 |
Ted Lilly | 76 | 201.2 | 2.5 | 3.3 | 2.9 | 30 | 102 | 4.31 |
Ray Burris | 77 | 211.2 | 3.7 | 1.9 | 2.8 | 28 | 118 | 4.20 |
John Henry Johnson | 78 | 270.2 | 3.9 | 1.7 | 2.8 | 27 | 102 | 4.40 |
Tom Underwood | 79 | 348.2 | 2.7 | 2.9 | 2.8 | 29 | 106 | 3.96 |
Kevin Appier | 80 | 264 | 2.7 | 2.8 | 2.8 | 33 | 96 | 4.98 |
Gene Nelson | 81 | 490.1 | 3.4 | 2.1 | 2.8 | 30 | 101 | 3.90 |
Don Sutton | 82 | 194.1 | 2.6 | 2.8 | 2.7 | 27 | 98 | 3.81 |
Buddy Groom | 83 | 245.1 | 3 | 2.4 | 2.7 | 33 | 104 | 4.16 |
Jay Howell | 84 | 195.2 | 1.8 | 3.2 | 2.5 | 26 | 107 | 3.39 |
Jerry Blevins | 85 | 267 | 3.5 | 1.5 | 2.5 | 28 | 123 | 3.88 |
Chad Gaudin | 86 | 343.1 | 2.4 | 2.3 | 2.4 | 28 | 100 | 4.60 |
Craig Breslow | 87 | 189.1 | 3 | 1.6 | 2.3 | 25 | 133 | 3.76 |
Bob Locker | 88 | 206.2 | 1.7 | 2.9 | 2.3 | 21 | 116 | 2.42 |
Steve Karsay | 89 | 219 | 2.4 | 2.2 | 2.3 | 25 | 88 | 4.68 |
Daniel Mengden | 90 | 302.2 | 2 | 2.5 | 2.3 | 23 | 90 | 4.58 |
Dave Heaverlo | 91 | 221.1 | 3.6 | 0.7 | 2.2 | 20 | 107 | 3.94 |
Kirk Saarloos | 92 | 331.2 | 3.2 | 1.1 | 2.2 | 25 | 98 | 4.98 |
Joe Kennedy | 93 | 196.2 | 2.2 | 1.9 | 2.1 | 23 | 108 | 4.51 |
Esteban Loaiza | 94 | 169.1 | 1.3 | 2.6 | 2.0 | 22 | 96 | 4.20 |
Dick Bosman | 95 | 234.2 | 1.9 | 1.9 | 1.9 | 18 | 92 | 3.95 |
Dan Otero | 96 | 172.1 | 2.3 | 1.4 | 1.9 | 18 | 116 | 3.32 |
Dave Telgheder | 97 | 200.1 | 2.5 | 1.2 | 1.9 | 22 | 90 | 5.20 |
Lou Trivino | 98 | 231 | 2 | 1.7 | 1.9 | 21 | 113 | 3.96 |
Jim Roland | 99 | 177.1 | 2.8 | 0.6 | 1.7 | 16 | 133 | 3.61 |
Cole Irvin | 100 | 178.1 | 1.3 | 2.1 | 1.7 | 19 | 96 | 4.30 |
Greg Smith | 101 | 190.1 | 2 | 1.4 | 1.7 | 20 | 99 | 4.82 |
Jesse Hahn | 102 | 212.2 | 0.6 | 2.8 | 1.7 | 18 | 88 | 4.01 |
Eric Plunk | 103 | 322 | 1.7 | 1.7 | 1.7 | 17 | 92 | 4.25 |
Mike Mohler | 104 | 334 | 2.8 | 0.5 | 1.7 | 21 | 96 | 4.94 |
Mark Redman | 105 | 191 | 1.7 | 1.4 | 1.6 | 19 | 97 | 5.05 |
Dan Straily | 106 | 230 | 1.8 | 1.3 | 1.6 | 17 | 94 | 4.73 |
Chris Codiroli | 107 | 640.2 | -1.1 | 4.2 | 1.6 | 16 | 82 | 4.48 |
Dana Eveland | 108 | 212 | 0.6 | 2.4 | 1.5 | 17 | 85 | 4.29 |
Jose Rijo | 109 | 339.2 | -0.9 | 3.8 | 1.5 | 13 | 83 | 4.12 |
Carlos Reyes | 110 | 346.2 | 2.6 | 0.3 | 1.5 | 21 | 94 | 5.24 |
Tom Candiotti | 111 | 257.2 | 1.6 | 1.2 | 1.4 | 16 | 88 | 5.34 |
Doug Johns | 112 | 212.2 | 1.2 | 1.3 | 1.3 | 17 | 87 | 5.34 |
Don Wengert | 113 | 325 | 2.1 | 0.3 | 1.2 | 17 | 86 | 5.46 |
Ryan Dull | 114 | 167.2 | 1.3 | 0.9 | 1.1 | 11 | 102 | 4.33 |
Andrew Triggs | 115 | 163 | 0.4 | 1.7 | 1.1 | 11 | 92 | 4.12 |
Omar Olivares | 116 | 182.2 | 0.3 | 1.6 | 1.0 | 11 | 81 | 5.07 |
T.J. Mathews | 117 | 243 | 1.2 | 0.7 | 1.0 | 13 | 96 | 4.66 |
Glenn Abbott | 118 | 291.1 | 0.1 | 1.8 | 1.0 | 8 | 86 | 4.03 |
Scott Sanderson | 119 | 206.1 | 0.3 | 1.4 | 0.9 | 8 | 95 | 4.29 |
Dave Hamilton | 120 | 436.1 | -0.3 | 1.8 | 0.8 | 9 | 86 | 4.00 |
Joaquin Andujar | 121 | 216 | 1.1 | 0.3 | 0.7 | 8 | 89 | 5.12 |
Santiago Casilla | 122 | 250.2 | 0.8 | 0.4 | 0.6 | 9 | 91 | 4.55 |
Keith Atherton | 123 | 292.1 | 1.8 | -0.7 | 0.6 | 6 | 94 | 4.43 |
Lew Krausse | 124 | 325 | 0.3 | 0.8 | 0.6 | 4 | 83 | 3.92 |
Dave Beard | 125 | 181.2 | -0.5 | 1.4 | 0.5 | 8 | 93 | 3.91 |
Pete Broberg | 126 | 165.2 | -0.6 | 1.4 | 0.4 | 4 | 79 | 3.94 |
Kelly Downs | 127 | 201.2 | 0.3 | 0.4 | 0.4 | 3 | 84 | 4.70 |
Darold Knowles | 128 | 270.2 | 1.5 | -0.8 | 0.4 | 3 | 111 | 3.89 |
Todd Van Poppel | 129 | 406.2 | -0.3 | 0.8 | 0.3 | 5 | 77 | 5.43 |
Bill Krueger | 130 | 443 | -2.2 | 2.7 | 0.3 | 3 | 84 | 4.45 |
Vin Mazzaro | 131 | 213.2 | -0.3 | 0.7 | 0.2 | 3 | 90 | 5.04 |
Mike Warren | 132 | 204.2 | -0.9 | 0.4 | -0.3 | -4 | 75 | 4.75 |
Lary Sorensen | 133 | 183.1 | -1.4 | 0.9 | -0.3 | -3 | 76 | 4.39 |
Tim Conroy | 134 | 310.2 | -0.7 | 0.1 | -0.3 | -3 | 87 | 4.78 |
Jim Todd | 135 | 285.2 | 0 | -1 | -0.5 | -2 | 94 | 4.31 |
Joe Slusarski | 136 | 194 | -1.5 | -0.7 | -1.1 | -11 | 71 | 5.37 |
Jeff Jones | 137 | 205 | -1.7 | -1.9 | -1.8 | -13 | 94 | 4.85 |