GM: Sandy Alderson (since 1983)
| Player | Age | Service | G | fWAR | Salary $M | Surplus $M |
|---|---|---|---|---|---|---|
| Mark McGwire | 32 | FA-elig | 130 | 7.3 | 7.0 | -0.9 |
| Scott Brosius | 29 | arb | 114 | 5.8 | 1.0 | +3.9 |
| Terry Steinbach | 34 | FA-elig | 145 | 3.9 | 4.2 | -0.9 |
| Geronimo Berroa | 31 | FA-elig | 153 | 2.8 | 1.1 | +1.2 |
| Ariel Prieto | 26 | pre-arb | 21 | 2.2 | 0.2 | +1.7 |
| Billy Taylor | 34 | pre-arb | 55 | 1.5 | 0.1 | +1.1 |
| Tony Batista | 22 | pre-arb | 74 | 1.4 | 0.1 | +1.1 |
| Willie Adams | 23 | pre-arb | 12 | 1.4 | 0.1 | +1.0 |
| Jason Giambi | 25 | pre-arb | 140 | 1.2 | 0.1 | +0.9 |
| Ernie Young | 26 | pre-arb | 141 | 1.2 | 0.1 | +0.9 |
| Doug Johns | 28 | pre-arb | 42 | 0.9 | 0.1 | +0.6 |
| Dave Telgheder | 29 | arb | 16 | 0.8 | 0.1 | +0.5 |
| Steve Wojciechowski | 25 | – | 18 | 0.7 | – | – |
| Matt Stairs | 28 | arb | 61 | 0.7 | 0.1 | +0.5 |
| John Wasdin | 23 | pre-arb | 25 | 0.6 | 0.1 | +0.4 |
| Buddy Groom | 30 | arb | 72 | 0.6 | 0.2 | +0.3 |
| Mike Mohler | 27 | arb | 72 | 0.5 | 0.2 | +0.3 |
| Jim Corsi | 34 | FA-elig | 56 | 0.5 | 0.5 | -0.0 |
| Don Wengert | 26 | pre-arb | 36 | 0.3 | 0.1 | +0.2 |
| Scott Spiezio | 23 | – | 9 | 0.2 | – | – |
| Carlos Reyes | 27 | pre-arb | 46 | 0.2 | 0.2 | -0.0 |
| Paul Fletcher | 29 | – | 1 | -0.0 | – | – |
| Mark Acre | 27 | pre-arb | 22 | -0.0 | 0.1 | -0.1 |
| Kerwin Moore | 25 | pre-arb | 22 | -0.0 | 0.1 | -0.1 |
| Bobby Chouinard | 24 | – | 13 | -0.0 | – | – |
| Aaron Small | 24 | pre-arb | 12 | -0.0 | 0.1 | -0.1 |
| Brent Gates | 26 | arb | 64 | -0.1 | 0.3 | -0.4 |
| John Briscoe | 28 | arb | 17 | -0.2 | 0.1 | -0.3 |
| Webster Garrison | 30 | – | 5 | -0.2 | – | – |
| Rafael Bournigal | 30 | arb | 88 | -0.2 | 0.1 | -0.3 |
| Damon Mashore | 26 | pre-arb | 50 | -0.2 | 0.1 | -0.3 |
| Brian Lesher | 25 | pre-arb | 26 | -0.3 | 0.1 | -0.3 |
| Jay Witasick | 23 | – | 12 | -0.3 | – | – |
| Mike Bordick | 30 | FA-elig | 155 | -0.3 | 2.0 | -2.3 |
| Izzy Molina | 25 | pre-arb | 14 | -0.3 | 0.1 | -0.4 |
| Todd Van Poppel↔ DET | 24 | arb | 28 | -0.4 | 0.2 | -0.6 |
| Steve Montgomery | 25 | pre-arb | 8 | -0.5 | 0.1 | -0.6 |
| Torey Lovullo | 30 | FA-elig | 65 | -0.5 | 0.2 | -0.6 |
| George Williams | 27 | pre-arb | 56 | -0.7 | 0.1 | -0.7 |
| Pedro Munoz | 27 | FA-elig | 34 | -0.9 | 0.6 | -1.3 |
| Phil Plantier | 27 | FA-elig | 73 | -1.0 | 0.5 | -1.3 |
| Allen Battle | 27 | pre-arb | 47 | -1.2 | 0.1 | -1.1 |
| Jose Herrera | 23 | – | 108 | -1.2 | – | – |
43 players appeared (WAR is complete); salary & surplus are on record for 36 of them (84%). 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 |