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August 24, 1999

BOS⇄STL

STL won this trade +$3.2M surplus BOS won this trade +0.3 WAR
BOSBOS Dan Duquette net −$3.2M net +0.3
received +$4.0M+$0.8M ± $15M expected surplus · −$3.2M realized received 1.5 ± 2 expected · 0.7 realized WAR
Playoff odds: this deal moved BOS's 1999 odds 79% → 81% (+2.4 pts) — how trade timing is graded ↗
receives — most valuable first
Kent MerckerP·31y·L/L
+$3.7M+$1.0M± $15M exp surplusrealized −$3.2M 1.5± 2 exp WARrealized 0.7
Prior
league baseline (track record outweighs draft pedigree) → 0.39/yr
Evidence
recent form 1.4/yr over 2.6 seasons
Talent
1.08/yr blended
Horizon
1.5 control yr × 0.95 age decline
STLSTL Walt Jocketty net +$3.2M net -0.3
received +$2.4M+$2.4M ± $24M expected surplus · +$0.0M realized received 1.4 ± 3 expected · 0.4 realized WAR
Playoff odds: this deal moved STL's 1999 odds 10% → 9% (-1.3 pts) — how trade timing is graded ↗
receives — most valuable first
Mike MatthewsP·25y·L/L
+$1.8M+$1.8M± $23M exp surplusrealized +$0.0M 1.2± 3 exp WARrealized 0.4
Prior
#40 overall draft pick — at the league baseline → 0.21/yr
Evidence
no MLB track record — leans on pedigree
Talent
0.21/yr blended
Horizon
5.5 control yrs
Dave Benham
+$0.3M+$0.3M± $5M exp surplusrealized +$0.0M 0.2± 1 exp WARrealized 0.0
Unidentified minor-league throw-in — valued at the ~0.2 WAR base rate (most produce nothing)

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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