GM: Billy Beane (since 1998)
| Player | Age | Service | G | fWAR | Salary $M | Surplus $M |
|---|---|---|---|---|---|---|
| Nick Swisher | 25 | pre-arb | 157 | 3.9 | 0.3 | +7.4 |
| Dan Haren | 25 | arb | 34 | 3.8 | 0.6 | +6.9 |
| Eric Chavez | 28 | FA-elig | 137 | 3.4 | 9.5 | -2.8 |
| Joe Blanton | 25 | pre-arb | 32 | 3.2 | 0.3 | +5.9 |
| Jason Kendall | 32 | FA-elig | 143 | 2.9 | 11.5 | -5.8 |
| Milton Bradley | 28 | FA-elig | 96 | 2.6 | 3.0 | +2.1 |
| Frank Thomas | 38 | FA-elig | 137 | 2.4 | 3.1 | +1.6 |
| Huston Street | 22 | pre-arb | 69 | 2.3 | 0.3 | +4.3 |
| Esteban Loaiza | 34 | FA-elig | 26 | 2.3 | 6.0 | -1.5 |
| Barry Zito | 28 | FA-elig | 34 | 2.1 | 7.9 | -3.7 |
| Mark Ellis | 29 | arb | 124 | 2.0 | 2.2 | +1.6 |
| Justin Duchscherer | 28 | arb | 53 | 1.5 | 0.3 | +2.6 |
| Kiko Calero | 31 | arb | 70 | 1.5 | 0.8 | +2.1 |
| Jay Payton | 33 | FA-elig | 142 | 1.0 | 4.0 | -2.1 |
| Joe Kennedy | 27 | arb | 39 | 0.8 | 2.4 | -0.9 |
| Rich Harden | 24 | arb | 9 | 0.7 | 1.2 | +0.1 |
| Bobby Crosby | 26 | arb | 96 | 0.4 | 0.8 | -0.0 |
| Marco Scutaro | 30 | arb | 117 | 0.3 | 0.3 | +0.3 |
| Bobby Kielty | 29 | – | 81 | 0.2 | – | – |
| Ron Flores | 26 | – | 25 | 0.2 | – | – |
| Chad Gaudin | 23 | – | 55 | 0.1 | – | – |
| Brad Halsey | 25 | pre-arb | 52 | 0.1 | 0.3 | -0.1 |
| Dan Johnson | 26 | pre-arb | 91 | 0.1 | 0.3 | -0.2 |
| Jason Windsor | 23 | – | 4 | 0.0 | – | – |
| Jeremy Brown | 26 | – | 5 | 0.0 | – | – |
| Matt Roney | 26 | – | 3 | 0.0 | – | – |
| Santiago Casilla | 25 | – | 2 | 0.0 | – | – |
| Mike Rouse | 26 | – | 8 | -0.0 | – | – |
| Doug Clark | 30 | – | 6 | -0.1 | – | – |
| Adam Melhuse | 34 | FA-elig | 49 | -0.2 | 0.7 | -1.0 |
| D'Angelo Jimenez↔ TEX | 28 | FA-elig | 8 | -0.2 | 0.2 | -0.5 |
| Jay Witasick | 33 | FA-elig | 20 | -0.2 | 1.0 | -1.3 |
| Randy Keisler | 30 | – | 11 | -0.2 | – | – |
| Scott Sauerbeck↔ CLE | 34 | FA-elig | 22 | -0.2 | 0.6 | -1.0 |
| Shane Komine | 25 | – | 2 | -0.3 | – | – |
| Hiram Bocachica | 30 | – | 8 | -0.3 | – | – |
| Steve Karsay | 34 | – | 9 | -0.4 | – | – |
| Mark Kotsay | 30 | FA-elig | 129 | -0.4 | 7.0 | -7.8 |
| Kirk Saarloos | 27 | arb | 35 | -0.4 | 0.4 | -1.2 |
| Antonio Perez | 26 | arb | 57 | -1.3 | 0.3 | -2.9 |
40 players appeared (WAR is complete); salary & surplus are on record for 27 of them (68%). Players without a salary show "–" — no single historical salary source is fully complete (especially 2020–2022).
WAR = FanGraphs (fWAR). Green = produced more value than paid (bargain); red = paid more than produced. Service: pre-arb (<3 yr) / arb (3–6) / FA-eligible (6+). Click headers to sort.
| Player | Year | WAR for OAK |
|---|---|---|
| Rickey Henderson | 1989 | 26.8 |
| Mark Ellis | 2001 | 22.1 |
| Dennis Eckersley | 1987 | 19.3 |
| Carney Lansford | 1982 | 16.7 |
| Josh Donaldson | 2008 | 13.8 |
| Jed Lowrie | 2013 | 13.0 |
| Brett Anderson | 2007 | 11.5 |
| Sean Manaea | 2015 | 11.2 |
| Player | Year traded | WAR elsewhere |
|---|---|---|
| Rickey Henderson | 1984 | 26.6 |
| Carlos González | 2008 | 24.7 |
| Andre Ethier | 2005 | 24.4 |
| Gio Gonzalez | 2011 | 20.8 |
| Josh Donaldson | 2014 | 20.4 |
| Mark McGwire | 1997 | 19.7 |
| Aaron Harang | 2003 | 19.3 |
| Jeremy Bonderman | 2002 | 15.8 |