GM: Billy Beane (since 1998)
| Player | Age | Service | G | fWAR | Salary $M | Surplus $M |
|---|---|---|---|---|---|---|
| Eric Chavez | 26 | FA-elig | 125 | 5.3 | 5.3 | +3.8 |
| Tim Hudson | 28 | arb | 27 | 4.6 | 5.0 | +2.8 |
| Rich Harden | 22 | – | 31 | 4.1 | – | – |
| Mark Kotsay | 28 | FA-elig | 148 | 4.0 | 5.5 | +1.4 |
| Eric Byrnes | 28 | arb | 143 | 3.6 | 0.3 | +5.8 |
| Erubiel Durazo | 30 | arb | 142 | 3.1 | 2.1 | +3.2 |
| Barry Zito | 26 | arb | 34 | 3.0 | 3.0 | +2.2 |
| Bobby Crosby | 24 | pre-arb | 151 | 2.6 | 0.3 | +4.2 |
| Mark Mulder | 26 | arb | 33 | 2.4 | 4.5 | -0.3 |
| Jermaine Dye | 30 | FA-elig | 137 | 1.8 | 11.7 | -8.5 |
| Damian Miller | 34 | FA-elig | 110 | 1.7 | 3.0 | -0.1 |
| Mark Redman | 30 | arb | 32 | 1.3 | 2.0 | +0.3 |
| Scott Hatteberg | 34 | FA-elig | 152 | 1.2 | 2.3 | -0.2 |
| Adam Melhuse | 32 | arb | 69 | 1.0 | 0.4 | +1.3 |
| Ricardo Rincon | 34 | FA-elig | 67 | 0.9 | 1.8 | -0.2 |
| Octavio Dotel↔ HOU | 30 | arb | 45 | 0.8 | 1.6 | -0.2 |
| Chris Hammond | 38 | FA-elig | 41 | 0.6 | 2.4 | -1.3 |
| Jim Mecir | 34 | FA-elig | 65 | 0.6 | 3.3 | -2.3 |
| Chad Bradford | 29 | FA-elig | 68 | 0.1 | 1.0 | -0.7 |
| Joe Blanton | 23 | – | 3 | 0.1 | – | – |
| Chad Harville↔ HOU | 27 | arb | 3 | 0.0 | 0.0 | -0.0 |
| Bobby Kielty | 27 | arb | 83 | -0.0 | 0.3 | -0.4 |
| Justin Duchscherer | 26 | arb | 53 | -0.0 | 0.3 | -0.3 |
| Marco Scutaro | 28 | pre-arb | 137 | -0.0 | 0.3 | -0.4 |
| Justin Lehr | 26 | – | 27 | -0.0 | – | – |
| Mike Rose | 27 | – | 2 | -0.0 | – | – |
| Nick Swisher | 23 | – | 20 | -0.0 | – | – |
| Kirk Saarloos | 25 | – | 6 | -0.1 | – | – |
| Ramon Castro | 24 | – | 9 | -0.3 | – | – |
| Santiago Casilla | 23 | – | 4 | -0.3 | – | – |
| Esteban German | 26 | pre-arb | 31 | -0.3 | 0.3 | -0.9 |
| Mark McLemore | 39 | FA-elig | 77 | -0.6 | 0.6 | -1.6 |
| Arthur Rhodes | 34 | FA-elig | 37 | -0.6 | 1.8 | -2.8 |
| Billy McMillon | 32 | FA-elig | 52 | -0.6 | 0.5 | -1.5 |
| Frank Menechino↔ TOR | 33 | arb | 13 | -0.7 | 0.1 | -1.3 |
| Eric Karros | 36 | FA-elig | 40 | -1.0 | 0.6 | -2.2 |
36 players appeared (WAR is complete); salary & surplus are on record for 28 of them (78%). 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 |