GM: Billy Beane (since 1998)
| Player | Age | Service | G | fWAR | Salary $M | Surplus $M |
|---|---|---|---|---|---|---|
| Eric Chavez | 27 | FA-elig | 160 | 5.2 | 8.5 | +1.2 |
| Mark Ellis | 28 | arb | 122 | 4.4 | 0.4 | +7.9 |
| Dan Haren | 24 | pre-arb | 34 | 3.8 | 0.3 | +6.9 |
| Bobby Crosby | 25 | pre-arb | 84 | 3.8 | 0.3 | +6.7 |
| Rich Harden | 23 | pre-arb | 22 | 3.6 | 0.3 | +6.4 |
| Barry Zito | 27 | arb | 35 | 3.0 | 5.6 | +0.1 |
| Joe Blanton | 24 | pre-arb | 33 | 2.2 | 0.3 | +3.8 |
| Nick Swisher | 24 | pre-arb | 131 | 2.2 | 0.3 | +3.8 |
| Justin Duchscherer | 27 | arb | 65 | 1.9 | 0.3 | +3.3 |
| Marco Scutaro | 29 | arb | 118 | 1.9 | 0.3 | +3.1 |
| Jason Kendall | 31 | FA-elig | 150 | 1.8 | 10.6 | -7.1 |
| Mark Kotsay | 29 | FA-elig | 139 | 1.8 | 6.5 | -3.2 |
| Huston Street | 21 | pre-arb | 67 | 1.7 | 0.3 | +2.9 |
| Kirk Saarloos | 26 | – | 29 | 1.5 | – | – |
| Dan Johnson | 25 | – | 109 | 1.4 | – | – |
| Jay Payton↔ BOS | 32 | FA-elig | 69 | 1.3 | 1.9 | +0.4 |
| Bobby Kielty | 28 | arb | 116 | 1.0 | 0.9 | +1.0 |
| Eric Byrnes↔ BAL | 29 | arb | 59 | 0.8 | 1.0 | +0.5 |
| Kiko Calero | 30 | pre-arb | 58 | 0.7 | 0.3 | +1.0 |
| Joe Kennedy↔ COL | 26 | arb | 19 | 0.7 | 1.2 | +0.1 |
| Jay Witasick↔ COL | 32 | – | 28 | 0.2 | – | – |
| Adam Melhuse | 33 | arb | 39 | 0.2 | 0.4 | -0.1 |
| Ron Flores | 25 | – | 11 | 0.1 | – | – |
| Freddie Bynum Jr. | 25 | – | 7 | 0.1 | – | – |
| Seth Etherton | 28 | – | 3 | 0.1 | – | – |
| Jermaine Clark | 28 | – | 4 | 0.0 | – | – |
| Santiago Casilla | 24 | – | 3 | 0.0 | – | – |
| Matt Watson | 26 | – | 19 | -0.0 | – | – |
| Octavio Dotel | 31 | FA-elig | 15 | -0.0 | 4.8 | -4.8 |
| Alberto Castillo↔ KCR | 35 | FA-elig | 1 | -0.0 | 0.0 | -0.1 |
| Keiichi Yabu | 36 | pre-arb | 40 | -0.0 | 0.8 | -0.8 |
| Hiram Bocachica | 29 | – | 9 | -0.1 | – | – |
| Britt Reames | 31 | – | 2 | -0.1 | – | – |
| Tim Harikkala | 33 | – | 8 | -0.1 | – | – |
| Ryan Glynn | 30 | – | 5 | -0.2 | – | – |
| Juan Cruz | 26 | arb | 28 | -0.2 | 0.6 | -1.0 |
| Erubiel Durazo | 31 | FA-elig | 41 | -0.4 | 4.7 | -5.5 |
| Ricardo Rincon | 35 | FA-elig | 67 | -0.5 | 1.9 | -2.9 |
| Charles Thomas | 26 | pre-arb | 30 | -0.5 | 0.3 | -1.3 |
| Keith Ginter | 29 | arb | 51 | -0.8 | 0.6 | -2.0 |
| Scott Hatteberg | 35 | FA-elig | 134 | -0.9 | 2.5 | -4.2 |
41 players appeared (WAR is complete); salary & surplus are on record for 28 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 |