GM: Billy Beane (since 1998)
| Player | Age | Service | G | fWAR | Salary $M | Surplus $M |
|---|---|---|---|---|---|---|
| Jason Giambi | 29 | arb | 152 | 7.7 | 3.1 | +7.8 |
| Miguel Tejada | 26 | arb | 160 | 3.5 | 0.3 | +4.7 |
| Tim Hudson | 24 | pre-arb | 33 | 3.5 | 0.2 | +4.7 |
| Gil Heredia | 34 | FA-elig | 32 | 2.7 | 2.1 | +1.7 |
| Ben Grieve | 24 | arb | 158 | 2.2 | 0.8 | +2.3 |
| Barry Zito | 22 | pre-arb | 14 | 2.1 | 0.2 | +2.8 |
| Randy Velarde | 37 | FA-elig | 122 | 2.1 | 3.0 | -0.0 |
| Eric Chavez | 22 | pre-arb | 153 | 2.0 | 0.2 | +2.6 |
| Kevin Appier | 32 | FA-elig | 31 | 1.9 | 5.6 | -2.8 |
| Terrence Long | 24 | pre-arb | 138 | 1.8 | 0.2 | +2.3 |
| Jeff Tam | 29 | pre-arb | 72 | 1.7 | 0.2 | +2.2 |
| Olmedo Saenz | 29 | FA-elig | 76 | 1.6 | 0.3 | +2.0 |
| Mark Mulder | 22 | pre-arb | 27 | 1.1 | 0.2 | +1.4 |
| Doug Jones | 43 | FA-elig | 54 | 1.1 | 0.6 | +0.9 |
| Jim Mecir↔ TBR | 30 | arb | 25 | 1.0 | 0.1 | +1.3 |
| Ramon Hernandez | 24 | pre-arb | 143 | 0.9 | 0.2 | +1.1 |
| Omar Olivares | 32 | FA-elig | 21 | 0.9 | 4.0 | -2.8 |
| Jason Isringhausen | 27 | arb | 66 | 0.9 | 0.8 | +0.4 |
| Adam Piatt | 24 | pre-arb | 60 | 0.8 | 0.2 | +0.9 |
| Sal Fasano | 28 | arb | 52 | 0.6 | 0.2 | +0.6 |
| Ryan Christenson | 26 | pre-arb | 121 | 0.4 | 0.2 | +0.4 |
| Ariel Prieto | 30 | – | 8 | 0.4 | – | – |
| Mike Stanley↔ BOS | 37 | FA-elig | 32 | 0.3 | 1.2 | -0.9 |
| Frank Menechino | 29 | pre-arb | 66 | 0.2 | 0.2 | +0.0 |
| Scott Service | 33 | FA-elig | 20 | 0.1 | 0.5 | -0.3 |
| Rich Becker↔ DET | 28 | FA-elig | 23 | 0.1 | 0.1 | +0.1 |
| Mike Magnante | 35 | FA-elig | 55 | 0.1 | 0.9 | -0.8 |
| Luis Vizcaino | 25 | pre-arb | 12 | 0.1 | 0.2 | -0.1 |
| Bo Porter | 27 | – | 17 | 0.1 | – | – |
| Jon Ratliff | 28 | – | 1 | 0.0 | – | – |
| Todd Belitz | 24 | – | 5 | 0.0 | – | – |
| Mark Bellhorn | 25 | – | 9 | 0.0 | – | – |
| A.J. Hinch | 26 | – | 6 | -0.0 | – | – |
| Eric Byrnes | 24 | – | 10 | -0.0 | – | – |
| John Jaha | 34 | FA-elig | 33 | -0.1 | 2.8 | -2.8 |
| Rich Sauveur | 36 | – | 10 | -0.1 | – | – |
| T.J. Mathews | 30 | arb | 50 | -0.1 | 1.2 | -1.4 |
| Marcus Jones | 25 | – | 1 | -0.1 | – | – |
| Jeremy Giambi | 25 | pre-arb | 104 | -0.2 | 0.2 | -0.5 |
| Jose Ortiz | 23 | – | 7 | -0.2 | – | – |
| Ron Mahay↔ MIA | 29 | arb | 5 | -0.3 | 0.0 | -0.4 |
| Mario Valdez | 25 | arb | 5 | -0.3 | 0.2 | -0.6 |
| Matt Stairs | 32 | FA-elig | 143 | -0.4 | 3.0 | -3.6 |
| Jorge Velandia↔ NYM | 25 | arb | 18 | -0.4 | 0.1 | -0.7 |
44 players appeared (WAR is complete); salary & surplus are on record for 34 of them (77%). 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 |