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April 29, 1990

ANA⇄NYY

ANA won this trade +$11.2M surplus ANA won this trade +0.3 WAR
ANAANA Mike Port net +$11.2M net +0.3
received +$17.6M+$17.6M ± $32M expected surplus · +$2.4M realized received 3.4 ± 4 expected · 0.4 realized WAR
Playoff odds: this deal moved ANA's 1990 odds 17% → 24% (+7 pts) — how trade timing is graded ↗
receives — most valuable first
Luis PoloniaOF·26y·L/L
+$17.3M+$17.3M± $32M exp surplusrealized +$2.4M 3.4± 4 exp WARrealized 0.4
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 1.8/yr over 1.5 season
Talent
1.13/yr blended
Horizon
3.0 control yrs
NYYNYY Hardy Peterson net −$11.2M net -0.3
received +$13.6M+$12.8M ± $35M expected surplus · −$8.8M realized received 3.3 ± 4 expected · 0.1 realized WAR
Playoff odds: this deal moved NYY's 1990 odds 1% → 1% (-0.4 pts) — how trade timing is graded ↗
receives — most valuable first
Claudell WashingtonOF·35y·L/L
+$10.5M+$9.7M± $13M exp surplusrealized −$10.4M 2.1± 2 exp WARrealized -0.8
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 2.3/yr over 1.9 season
Talent
1.47/yr blended
Horizon
1.5 control yr × 0.93 age decline
Rich MonteleoneP·27y·R/R
+$2.7M+$2.7M± $33M exp surplusrealized +$1.6M 1.2± 4 exp WARrealized 0.9
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 0.3/yr over 0.9 season
Talent
0.27/yr blended
Horizon
5.0 control yrs × 0.90 age decline

Each player is valued on what he was expected to produce at the time of the trade, versus what he actually produced for his new team.

Expected WAR blends a player's pedigree (composite top-100 rank / draft slot, or a baseline) with his recent track record, projected over the years of team control acquired. The ± figure is a historically calibrated predictive standard deviation, measuring how widely comparable forecasts have missed around their expected value. Surplus values that production at the FA market price of a win (~$8M/WAR) minus salary — so cost-controlled players carry large surplus and expensive ones little, even at the same WAR. Who won is descriptive, not a skill claim: ~99% of a trade's outcome is unforeseeable at the time.

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Decision-maker records extend to 1933; resource-controlled WAR and payroll metrics cover 1985–2026. Data sources include FanGraphs, Baseball-Reference, the Chadwick Bureau register, the Lahman Database, prospect rankings from Baseball America, MLB Pipeline, and FanGraphs, and public payroll records. Transaction and trade data was obtained free of charge from and is copyrighted by Retrosheet. Executive birth/death data via Wikidata (CC0).
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