
Born May 18, 1976 · Santa Monica, CA · age 50
Billy Beane's longtime lieutenant and successor as Oakland A's general manager, continuing the franchise's value-driven, low-budget approach.
11 seasons with salary-era data across 1 stint. All figures are franchise-level outcomes during the tenure, not solely attributable to one executive.
| Team | Role | Years | Szns | WAB | WAB/yr | TAB | WAR surp | HG | Trade | FA | R5 | AcqLev | W-L% | PO | Pen | WS | Surp $M |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ▸ |
GM | 2016–present | 10 | +14.1 | +1.41 | -2.9 | +57.5 | +49.0 | +1.4 | -74.0 | +0.8 | 2.60 | 0.468 | 3 | – | – | +203 |
| Career total (1985+ data) | 11 | +14.1 | -2.9 | +57.5 | +49.0 | +1.4 | -74.0 | +0.8 | 2.60 | 0.468 | 3 | – | – | +203 | |||
Acquired minus surrendered / signed minus walked.
Every roster slot ranked best→worst by WAR, averaged across David Forst's seasons. Bars = his rosters; the black line = the league-average player at each slot. Staying above the line deep into the roster is the depth edge.
| Player | Pos | Team | How | Year | Szns | fWAR | WAR/yr | Lev |
|---|---|---|---|---|---|---|---|---|
| Sean Murphy | C | Draft | 2016 | 4 | +10.5 | +2.6 | – | |
| Brent Rooker | DH/OF | Trade | 2023 | 3 | +9.5 | +3.2 | 0.0 | |
| Shea Langeliers | C | Trade | 2022 | 5 | +9.4 | +1.9 | – | |
| Frankie Montas | P | Trade | 2018 | 5 | +9.4 | +1.9 | 4.9 | |
| Ramón Laureano | OF | Trade | 2017 | 6 | +9.2 | +1.5 | – | |
| Nick Kurtz | 1B | Draft | 2025 | 2 | +7.6 | +3.8 | – | |
| Liam Hendriks | P | Trade | 2016 | 5 | +7.6 | +1.5 | 0.1 | |
| Khris Davis | DH/OF | Trade | 2016 | 3 | +7.4 | +2.5 | 0.2 | |
| Zack Gelof | 2B | Draft | 2023 | 3 | +5.6 | +1.9 | – | |
| Jacob Wilson | SS | Draft | 2024 | 3 | +5.3 | +1.8 | – | |
| Tony Kemp | 2B/OF | Trade | 2020 | 3 | +4.8 | +1.6 | 9.5 | |
| Tyler Soderstrom | 1B/OF | Draft | 2023 | 3 | +4.4 | +1.5 | – | |
| Lawrence Butler | OF | Draft | 2023 | 2 | +3.8 | +1.9 | – | |
| Cole Irvin | P | Trade | 2021 | 2 | +3.4 | +1.7 | 7.2 | |
| JJ Bleday | OF | Trade | 2023 | 2 | +3.4 | +1.7 | 0.0 | |
| Blake Treinen | P | Trade | 2017 | 2 | +3.3 | +1.7 | – | |
| Elvis Andrus | SS | Trade | 2021 | 2 | +3.2 | +1.6 | 5.8 | |
| Paul Blackburn | P | Trade | 2016 | 6 | +3.1 | +0.5 | – | |
| Luis Severino | P | Free agency | 2024 | 2 | +3.1 | +1.6 | 1.7 | |
| Mason Miller | P | Draft | 2023 | 3 | +3.0 | +1.0 | – | |
| Rich Hill | P | Trade | 2016 | 1 | +2.7 | +2.7 | 0.2 | |
| Stephen Piscotty | OF | Trade | 2018 | 2 | +2.7 | +1.4 | 19.7 | |
| J. T. Ginn | P | Trade | 2022 | 3 | +2.4 | +0.8 | – | |
| Matt Joyce | OF | Free agency | 2016 | 2 | +2.4 | +1.2 | 0.8 | |
| Robbie Grossman | OF | Free agency | 2019 | 2 | +2.3 | +1.2 | 5.7 | |
| Yusmeiro Petit | P | Free agency | 2017 | 3 | +2.1 | +0.7 | 3.6 | |
| Mike Fiers | P | Free agency | 2018 | 3 | +2.0 | +0.7 | 0.7 | |
| Starling Marte | OF | Trade | 2021 | 1 | +2.0 | +2.0 | 7.1 | |
| Max Schuemann | SS | Draft | 2024 | 2 | +1.9 | +0.9 | – | |
| Yonder Alonso | 1B | Trade | 2017 | 1 | +1.9 | +1.9 | 0.7 | |
| James Kaprielian | P | Trade | 2017 | 3 | +1.8 | +0.6 | – | |
| Homer Bailey | P | Trade | 2019 | 1 | +1.8 | +1.8 | 12.6 | |
| Andrew Triggs | P | Trade | 2016 | 3 | +1.7 | +0.6 | – | |
| Ryan Noda | 1B | Draft | 2023 | 1 | +1.5 | +1.5 | – | |
| Joakim Soria | P | Free agency | 2018 | 2 | +1.5 | +0.7 | 6.5 | |
| Ryan Madson | P | Trade | 2016 | 2 | +1.5 | +0.7 | 0.0 | |
| Hogan Harris | P | Draft | 2023 | 4 | +1.4 | +0.4 | – | |
| Zach Jackson | P | Draft | 2022 | 2 | +1.3 | +0.7 | – | |
| Luis Medina | P | Trade | 2022 | 3 | +1.3 | +0.4 | – | |
| Jeffrey Springs | P | Trade | 2025 | 1 | +1.3 | +1.3 | 1.2 | |
| Jacob Lopez | P | Trade | 2024 | 1 | +1.2 | +1.2 | 0.8 | |
| Nick Martini | DH/OF | Trade | 2018 | 1 | +1.2 | +1.2 | – | |
| Mitch Spence | P | Draft | 2024 | 1 | +1.2 | +1.2 | – | |
| Jesús Luzardo | P | Trade | 2017 | 2 | +1.1 | +0.6 | – | |
| Ross Stripling | P | Trade | 2024 | 1 | +1.1 | +1.1 | 0.3 | |
| Denzel Clarke | OF | Draft | 2025 | 1 | +1.0 | +1.0 | – | |
| Carlos Cortes | OF | Draft | 2025 | 2 | +1.0 | +0.5 | – | |
| Tyler Ferguson | P | Draft | 2024 | 2 | +1.0 | +0.5 | – | |
| Jurickson Profar | OF | Trade | 2019 | 1 | +1.0 | +1.0 | 6.9 | |
| Esteury Ruiz | OF | Trade | 2023 | 1 | +1.0 | +1.0 | 0.0 | |
| Miguel Andújar | 3B/OF | Trade | 2024 | 2 | +0.9 | +0.4 | 0.1 | |
| Sean Newcomb | P | Trade | 2023 | 2 | +0.9 | +0.5 | 0.0 | |
| Osvaldo Bido | P | Free agency | 2023 | 1 | +0.8 | +0.8 | 0.3 | |
| Lucas Erceg | P | Trade | 2023 | 2 | +0.8 | +0.4 | – | |
| Jack Perkins | P | Draft | 2025 | 2 | +0.8 | +0.4 | – | |
| Joe Boyle | P | Trade | 2023 | 2 | +0.7 | +0.4 | – | |
| Edwin Jackson | P | Free agency | 2018 | 1 | +0.7 | +0.7 | 4.1 | |
| Tommy La Stella | 2B/3B | Trade | 2020 | 1 | +0.7 | +0.7 | 12.9 | |
| Abraham Toro | 2B/3B | Trade | 2024 | 1 | +0.7 | +0.7 | 0.2 | |
| Jharel Cotton | P | Trade | 2016 | 1 | +0.6 | +0.6 | – | |
| Mark Leiter | P | Free agency | 2025 | 1 | +0.6 | +0.6 | 0.1 | |
| A. J. Puk | P | Draft | 2016 | 3 | +0.6 | +0.2 | – | |
| Conner Capel | OF | Trade | 2022 | 2 | +0.6 | +0.3 | 0.0 | |
| Brady Basso | P | Draft | 2024 | 3 | +0.5 | +0.2 | – | |
| Ryan Buchter | P | Trade | 2018 | 1 | +0.5 | +0.5 | 3.5 | |
| Mike Minor | P | Trade | 2020 | 1 | +0.5 | +0.5 | 8.7 | |
| Shawn Kelley | P | Trade | 2018 | 1 | +0.5 | +0.5 | 2.8 | |
| Christian Bethancourt | C | Trade | 2022 | 1 | +0.5 | +0.5 | 0.0 | |
| Andrew Chafin | P | Trade | 2021 | 1 | +0.5 | +0.5 | 1.6 | |
| Jake Diekman | P | Free agency | 2019 | 2 | +0.4 | +0.2 | 1.5 | |
| Deolis Guerra | P | Free agency | 2021 | 1 | +0.4 | +0.4 | 1.4 | |
| Michel Otañez | P | Draft | 2024 | 1 | +0.4 | +0.4 | – | |
| Ross Detwiler | P | Trade | 2016 | 1 | +0.4 | +0.4 | 0.0 | |
| Burch Smith | P | Trade | 2020 | 2 | +0.4 | +0.2 | 6.5 | |
| José Suarez | P | Trade | 2026 | 1 | +0.4 | +0.4 | 0.1 | |
| Daulton Jefferies | P | Draft | 2016 | 2 | +0.3 | +0.2 | – | |
| Jonathan Lucroy | C | Free agency | 2018 | 1 | +0.3 | +0.3 | 1.7 | |
| T. J. McFarland | P | Trade | 2024 | 1 | +0.3 | +0.3 | 0.1 | |
| Alika Williams | SS | Trade | 2026 | 1 | +0.3 | +0.3 | 0.1 | |
| Marc Rzepczynski | P | Trade | 2016 | 1 | +0.3 | +0.3 | 0.0 | |
| Yan Gomes | C | Trade | 2021 | 1 | +0.3 | +0.3 | 0.9 | |
| Josh Harrison | 2B/3B | Trade | 2021 | 1 | +0.3 | +0.3 | 0.9 | |
| Jake Lamb | 3B | Trade | 2020 | 1 | +0.3 | +0.3 | 5.8 | |
| Dustin Garneau | C | Trade | 2017 | 2 | +0.3 | +0.1 | 0.0 | |
| Francisco Pérez | P | Trade | 2023 | 1 | +0.3 | +0.3 | 0.0 | |
| Tanner Anderson | P | Trade | 2018 | 1 | +0.2 | +0.2 | 1.5 | |
| Joey Estes | P | Trade | 2022 | 2 | +0.2 | +0.1 | – | |
| Angel Felipe | P | Draft | 2023 | 1 | +0.2 | +0.2 | – | |
| Dérmis García | 1B | Draft | 2022 | 1 | +0.2 | +0.2 | – | |
| Kyle McCann | C | Draft | 2024 | 1 | +0.2 | +0.2 | – | |
| Sergio Romo | P | Free agency | 2021 | 1 | +0.2 | +0.2 | 0.7 | |
| Tyler Wade | 2B/OF | Free agency | 2022 | 1 | +0.2 | +0.2 | 0.0 | |
| Donovan Walton | 2B/SS | Trade | 2026 | 1 | +0.2 | +0.2 | 0.0 | |
| Aaron Civale | P | Trade | 2026 | 1 | +0.2 | +0.2 | 0.0 | |
| Joel Kuhnel | P | Trade | 2026 | 1 | +0.2 | +0.2 | 0.0 | |
| Scott Alexander | P | Free agency | 2024 | 1 | +0.1 | +0.1 | 0.0 | |
| Ryan Castellani | P | Free agency | 2022 | 1 | +0.1 | +0.1 | 0.0 | |
| Brett Harris | 3B | Draft | 2024 | 1 | +0.1 | +0.1 | – | |
| Grant Holman | P | Draft | 2024 | 2 | +0.1 | +0.0 | – | |
| Brooks Kriske | P | Free agency | 2025 | 1 | +0.1 | +0.1 | 0.0 | |
| Matt Krook | P | Free agency | 2024 | 1 | +0.1 | +0.1 | 0.0 | |
| Ryan Lavarnway | C | Free agency | 2016 | 1 | +0.1 | +0.1 | 0.0 | |
| Trevor May | P | Free agency | 2022 | 1 | +0.1 | +0.1 | 0.0 | |
| Austin Pruitt | P | Free agency | 2022 | 1 | +0.1 | +0.1 | 0.0 | |
| Brian Schlitter | P | Free agency | 2019 | 1 | +0.1 | +0.1 | 0.8 | |
| Luis Urías | 2B/3B | Free agency | 2025 | 1 | +0.1 | +0.1 | 0.1 | |
| Ken Waldichuk | P | Trade | 2022 | 1 | +0.1 | +0.1 | – | |
| Jordan Weems | P | Trade | 2020 | 1 | +0.1 | +0.1 | – | |
| John Axford | P | Trade | 2016 | 1 | +0.1 | +0.1 | 0.0 | |
| Tanner Roark | P | Trade | 2019 | 1 | +0.1 | +0.1 | 0.4 | |
| Josh Smith | P | Trade | 2017 | 1 | +0.1 | +0.1 | 0.0 | |
| Joel Payamps | P | Trade | 2022 | 1 | +0.1 | +0.1 | 0.0 | |
| Tyler Cyr | P | Trade | 2022 | 1 | +0.1 | +0.1 | 0.0 | |
| Austin Adams | P | Trade | 2024 | 1 | +0.0 | +0.0 | 0.0 | |
| Jeremy Bleich | P | Trade | 2018 | – | -0.0 | – | – | |
| Carlos Duran | P | Trade | 2025 | – | -0.0 | – | – | |
| Justin Grimm | P | Free agency | 2022 | – | -0.0 | – | – | |
| Reymin Guduan | P | Free agency | 2020 | 1 | +0.0 | +0.0 | 0.0 | |
| Drew Jackson | OF | Free agency | 2021 | – | -0.0 | – | – | |
| Pete Kozma | SS | Free agency | 2020 | – | -0.0 | – | – | |
| Easton Lucas | P | Trade | 2023 | 1 | -0.0 | -0.0 | – | |
| Josh Lucas | P | Trade | 2018 | – | -0.0 | – | – | |
| Willie MacIver | C | Draft | 2025 | – | -0.0 | – | – | |
| Mickey McDonald | DH/OF | Draft | 2022 | – | -0.0 | – | – | |
| Nate Mondou | 2B | Draft | 2022 | – | -0.0 | – | – | |
| Noah Murdock | P | Draft | 2025 | 1 | +0.0 | +0.0 | – | |
| Jack O'Loughlin | P | Draft | 2024 | – | -0.0 | – | – | |
| Gerardo Reyes | P | Free agency | 2023 | 1 | +0.0 | +0.0 | 0.0 | |
| Brian Serven | C | Free agency | 2025 | 1 | +0.0 | +0.0 | 0.0 | |
| Michael Stefanic | 2B | Free agency | 2025 | 1 | +0.0 | +0.0 | 0.0 | |
| Cody Thomas | OF | Draft | 2022 | 1 | -0.0 | -0.0 | – | |
| Collin Wiles | P | Draft | 2022 | 1 | +0.0 | +0.0 | – | |
| Cory Gearrin | P | Trade | 2018 | 1 | +0.0 | +0.0 | 0.0 | |
| Patrick Schuster | P | Trade | 2016 | 1 | +0.0 | +0.0 | 0.0 | |
| David McKay | P | Trade | 2022 | 1 | +0.0 | +0.0 | 0.0 | |
| Richard Lovelady | P | Trade | 2023 | 1 | +0.0 | +0.0 | 0.0 | |
| Austin Allen | C | Trade | 2020 | 2 | +0.0 | +0.0 | 0.3 | |
| Mason Barnett | P | Trade | 2024 | 1 | -0.1 | -0.1 | – | |
| Ben Bowden | P | Free agency | 2024 | – | -0.1 | – | – | |
| Aaron Brooks | P | Free agency | 2024 | – | -0.1 | – | – | |
| Jaff Decker | OF | Free agency | 2016 | – | -0.1 | – | – | |
| Geoff Hartlieb | P | Free agency | 2025 | – | -0.1 | – | – | |
| Jonah Heim | C | Trade | 2017 | 1 | -0.1 | -0.1 | – | |
| Dean Kiekhefer | P | Free agency | 2018 | – | -0.1 | – | – | |
| Sam Long | P | Trade | 2023 | – | -0.1 | – | – | |
| Jed Lowrie | 2B/SS | Free agency | 2021 | 5 | -0.1 | -0.0 | 20.5 | |
| Parker Markel | P | Free agency | 2022 | – | -0.1 | – | – | |
| Luis Morales | P | Draft | 2025 | 1 | -0.1 | -0.1 | – | |
| Mitch Moreland | 1B | Free agency | 2021 | – | -0.1 | – | – | |
| Jhonny Pereda | C | Trade | 2025 | – | -0.1 | – | – | |
| Jace Peterson | 2B/3B | Free agency | 2022 | 1 | -0.1 | -0.1 | 0.0 | |
| Cal Stevenson | OF | Trade | 2022 | – | -0.1 | – | – | |
| Alex Wood | P | Free agency | 2024 | – | -0.1 | – | – | |
| Domingo Acevedo | P | Trade | 2021 | 1 | -0.2 | -0.2 | – | |
| Arismendy Alcántara | 2B/OF | Trade | 2016 | – | -0.2 | – | – | |
| Elvis Alvarado | P | Draft | 2025 | 1 | -0.2 | -0.2 | – | |
| Michael Brady | P | Trade | 2017 | – | -0.2 | – | – | |
| Simón Castro | P | Free agency | 2016 | – | -0.2 | – | – | |
| Marco Estrada | P | Free agency | 2019 | – | -0.2 | – | – | |
| Darell Hernaiz | 3B/SS | Trade | 2023 | 1 | -0.2 | -0.2 | – | |
| Chris Herrmann | C/OF | Free agency | 2018 | – | -0.2 | – | – | |
| Nick Hundley | C | Free agency | 2019 | – | -0.2 | – | – | |
| Dany Jiménez | P | Free agency | 2021 | 2 | -0.2 | -0.1 | 0.0 | |
| Jared Koenig | P | Draft | 2022 | – | -0.2 | – | – | |
| Christian Lopes | 2B/OF | Draft | 2022 | – | -0.2 | – | – | |
| Sam Moll | P | Trade | 2017 | 1 | -0.2 | -0.2 | – | |
| Emilio Pagán | P | Trade | 2017 | – | -0.2 | – | – | |
| Norge Ruíz | P | Draft | 2022 | – | -0.2 | – | – | |
| Chad Smith | P | Trade | 2022 | – | -0.2 | – | – | |
| Michael Kelly | P | Trade | 2024 | 1 | -0.2 | -0.2 | 0.0 | |
| Justin Sterner | P | Trade | 2025 | 1 | -0.2 | -0.2 | 0.2 | |
| Jesús Aguilar | 1B | Free agency | 2023 | – | -0.3 | – | – | |
| Armando Alvarez | 1B/3B | Draft | 2024 | – | -0.3 | – | – | |
| José Leclerc | P | Free agency | 2025 | – | -0.3 | – | – | |
| Jeff McNeil | 2B/OF | Trade | 2025 | – | -0.3 | – | – | |
| Nate Orf | 2B/SS | Free agency | 2019 | – | -0.3 | – | – | |
| Spencer Patton | P | Free agency | 2023 | – | -0.3 | – | – | |
| Carlos Pérez | C | Free agency | 2019 | – | -0.3 | – | – | |
| Kirby Snead | P | Trade | 2022 | – | -0.3 | – | – | |
| Austin Wynns | C | Trade | 2025 | 1 | -0.3 | -0.3 | 0.2 | |
| Garrett Acton | P | Draft | 2023 | – | -0.4 | – | – | |
| Nick Allen | SS | Draft | 2022 | 1 | -0.4 | -0.4 | – | |
| Jonah Bride | 1B/3B | Draft | 2022 | – | -0.4 | – | – | |
| Daz Cameron | OF | Free agency | 2023 | – | -0.4 | – | – | |
| Aledmys Díaz | SS | Free agency | 2022 | – | -0.4 | – | – | |
| Jeurys Familia | P | Free agency | 2023 | 1 | -0.4 | -0.4 | 4.1 | |
| Chris Hatcher | P | Trade | 2017 | 1 | -0.4 | -0.4 | 0.0 | |
| Gunnar Hoglund | P | Trade | 2022 | – | -0.4 | – | – | |
| Jacob Lemoine | P | Draft | 2022 | – | -0.4 | – | – | |
| Zach Logue | P | Trade | 2022 | – | -0.4 | – | – | |
| Adrián Martinez | P | Trade | 2022 | – | -0.4 | – | – | |
| Colby Thomas | OF | Draft | 2025 | 1 | -0.4 | -0.4 | – | |
| Gio Urshela | 3B | Free agency | 2024 | – | -0.4 | – | – | |
| Kevin Smith | 3B/SS | Trade | 2022 | 1 | -0.4 | -0.4 | 0.0 | |
| Dustin Fowler | OF | Trade | 2017 | – | -0.5 | – | – | |
| Billy McKinney | OF | Free agency | 2022 | – | -0.5 | – | – | |
| Joey Meneses | 1B/DH | Free agency | 2025 | – | -0.5 | – | – | |
| Max Muncy | 3B | Draft | 2025 | – | -0.5 | – | – | |
| Drew Rucinski | P | Free agency | 2022 | – | -0.6 | – | – | |
| Kyle Muller | P | Trade | 2024 | 1 | -0.6 | -0.6 | 0.0 | |
| Scott Barlow | P | Free agency | 2026 | – | -0.7 | – | – | |
| Sheldon Neuse | 2B/3B | Trade | 2017 | 1 | -0.7 | -0.7 | – | |
| Chris Smith | P | Trade | 2016 | 1 | -0.7 | -0.7 | 0.0 | |
| Vimael Machín | 3B | Trade | 2019 | – | -0.9 | – | – | |
| Stephen Vogt | C | Free agency | 2022 | 4 | -0.9 | -0.2 | 2.8 | |
| Jordan Diaz | 2B/3B | Draft | 2022 | – | -1.0 | – | – | |
| Adam Oller | P | Trade | 2022 | – | -1.6 | – | – |
WAB = wins above what the team's payroll predicted (resource-controlled). WAR surplus = era-neutral value (WAR minus payroll in win-equivalents). Roster surplus $M = dollar value of WAR over cost. Build channels (realized fWAR): HG = home-grown via amateur draft / international signing; Trade = acquired minus surrendered (incl. purchases/waivers); FA = signed minus walked; R5 = Rule-5 / minor-league-draft pickups. Credit follows the acquisition year — home-grown to the regime at the player's draft/signing (not whoever was in the chair when he peaked), trade/FA/R5 to the GM who made the move. Players acquired as prospects before debuting (e.g. Smoltz, Bagwell; Rule-5 picks like Uggla) are counted as trade/R5, not home-grown. All are franchise-level outcomes during the stint, not solely attributable to one executive.