Look up every baseball trade since 1985, build hypothetical deals, and see what every player is worth.
Rosternomics is a free MLB trade calculator and trade values database built on a Bayesian model that grades every MLB trade since 1985 on what each player was expected to produce at the time vs. what he actually delivered. Build any hypothetical trade in the trade calculator, look up the verdict on any historical deal in the trade database, and see how every front office stacks up on GM rankings. We also track DVOS — the draft value over slot — for every scouting director since 1985.
A trade from this day in MLB history, graded with full hindsight. Every trade on June 3 →
June 3, 1988 CLE Buddy Black⇄KCR Pat Tabler CLE won · +9.1 WARThe latest deals across MLB, graded the moment they happen — expected value at the time, then tracked as it plays out. All 2026 trades →
The latest deals across MLB, graded the moment they happen — expected value at the time, then tracked as it plays out. All 2026 trades →
Wins Above Budget: games won above what the team's payroll predicted. The headline resource-controlled measure of front-office performance.
| Executive | Teams | Seasons | WAB | Titles | |
|---|---|---|---|---|---|
| 1 | Andrew Friedman | LAD TBR | 21 | +192.7 | 3 |
| 2 | John Schuerholz | ATL KCR | 23 | +180.5 | 2 |
| 3 | Billy Beane | OAK | 18 | +175.2 | 0 |
| 4 | Chris Antonetti | CLE | 16 | +143.4 | 0 |
| 5 | Pat Gillick | BAL PHI SEA TOR | 20 | +139.7 | 3 |
| 6 | Erik Neander | TBR | 10 | +125.3 | 0 |
See the full all-time leaderboard →
Current decision-makers only — who's building the best teams for their budget right now.
| Executive | Teams | Seasons | WAB | Titles | |
|---|---|---|---|---|---|
| 1 | Andrew Friedman | LAD TBR | 21 | +192.7 | 3 |
| 2 | Chris Antonetti | CLE | 16 | +143.4 | 0 |
| 3 | Erik Neander | TBR | 10 | +125.3 | 0 |
| 4 | Mike Chernoff | CLE | 11 | +122.6 | 0 |
| 5 | Brian Cashman | NYY | 28 | +86.4 | 3 |
| 6 | Matt Arnold | MIL | 6 | +67.9 | 0 |
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Draft Value Over Slot: career fWAR each pick produced above what its draft slot historically returns — the scouting analog of WAB. Hit DVOS (drafting position players above slot) is the reliable position skill; pitcher value-over-slot doesn't repeat.
| Scouting Director | Teams | Drafts | DVOS | Hit DVOS | |
|---|---|---|---|---|---|
| 1 | Roy Clark | ATL | 10 | +194.3 | +203.5 |
| 2 | Mike Arbuckle | PHI | 8 | +150.3 | +188.7 |
| 3 | Brian Sabean | NYY SFG | 6 | +134.3 | +107.9 |
| 4 | Logan White | LAD | 7 | +131.5 | +118.6 |
| 5 | John Barr | BAL NYM SFG | 11 | +129.0 | +143.4 |
| 6 | Sandy Johnson | TEX | 11 | +126.3 | +57.4 |
See the full scouting-director leaderboard →
The 10 picks whose career WAR most exceeded what their draft slot × position × age cohort historically produces by the same number of years post-draft. Settled cohorts only (drafts ≤ 2018, ≥7 yrs to play out). The patron saint is Mike Trout — #25 overall, college OF in 2009, and the headline +DVOS in the entire database.
| Player | Year | Pick | Team | Pos | School | Career WAR | DVOS | |
|---|---|---|---|---|---|---|---|---|
| 1 | Albert Pujols | 1999 | #402 | STL | IF | HS | 88 | +87 |
| 2 | Barry Bonds | 1985 | #6 | PIT | OF | COLL | 110 | +87 |
| 3 | Jeff Bagwell | 1989 | #109 | BOS | IF | COLL | 80 | +78 |
| 4 | Mike Trout | 2009 | #25 | ANA | OF | HS | 85 | +77 |
| 5 | Mike Mussina | 1990 | #20 | BAL | P | COLL | 70 | +64 |
| 6 | Randy Johnson | 1985 | #36 | WSN | P | COLL | 66 | +63 |
| 7 | Mookie Betts | 2011 | #172 | BOS | IF | HS | 63 | +62 |
| 8 | Clayton Kershaw | 2006 | #7 | LAD | P | HS | 71 | +61 |
| 9 | Mike Piazza | 1988 | #1390 | LAD | C | COLL | 59 | +59 |
| 10 | Aaron Judge | 2013 | #32 | NYY | OF | COLL | 64 | +59 |