Rosternomics
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December 7, 2001

NYYNYM

NYY won this trade +$10.4M surplus NYY won this trade +5.0 WAR
NYYNYY Brian Cashman net +$10.4M net +5.0
received +$2.4M+$2.4M ± $18M expected surplus · +$10.4M realized received 4.1 ± 2 expected · 5.0 realized WAR
Playoff odds: this deal moved NYY's 2002 odds 93% → 97% (+4 pts) — how trade timing is graded ↗
receives — most valuable first
Robin Ventura3B·34y·L/R
+$2.3M+$2.3M± $18M exp surplusrealized +$10.4M 4.1± 2 exp WARrealized 5.0
Prior
league baseline (track record outweighs draft pedigree) → 0.24/yr
Evidence
recent form 4.0/yr over 2.6 seasons
Talent
2.82/yr blended
Horizon
1.5 control yr × 0.97 age decline
NYMNYM Steve Phillips net −$10.4M net -5.0
received +$19.2M+$1.6M ± $14M expected surplus · +$0.0M realized received 2.4 ± 2 expected · 0.0 realized WAR
Playoff odds: this deal moved NYM's 2002 odds 16% → 7% (-8.4 pts) — how trade timing is graded ↗
receives — most valuable first
David JusticeOF·36y·L/L
+$19.4M+$1.4M± $14M exp surplusrealized +$0.0M 2.4± 2 exp WARrealized 0.0
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 3.2/yr over 2.4 seasons
Talent
2.18/yr blended
Horizon
1.1 control yr × 0.99 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.