Rosternomics
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March 9, 1989

ANATOR

ANA won this trade +$0.8M surplus ANA won this trade +0.4 WAR
ANAANA Mike Port net +$0.8M net +0.4
received +$1.6M+$1.6M ± $30M expected surplus · −$0.8M realized received 1.2 ± 4 expected · 0.2 realized WAR
Playoff odds: this deal moved ANA's 1989 odds 54% → 55% (+1.2 pts) — how trade timing is graded ↗
receives — most valuable first
Cliff YoungP·24y·L/L
+$1.8M+$1.8M± $30M exp surplusrealized −$0.8M 1.2± 4 exp WARrealized 0.2
Prior
no pedigree — league baseline → 0.21/yr
Evidence
no MLB track record — leans on pedigree
Talent
0.21/yr blended
Horizon
5.5 control yrs
TORTOR Pat Gillick net −$0.8M net -0.4
received +$4.8M+$4.8M ± $17M expected surplus · −$1.6M realized received 1.5 ± 2 expected · -0.2 realized WAR
Playoff odds: this deal moved TOR's 1989 odds 66% → 65% (-1 pts) — how trade timing is graded ↗
receives — most valuable first
DeWayne BuiceP·31y·R/R
+$5.0M+$5.0M± $17M exp surplusrealized −$1.6M 1.5± 2 exp WARrealized -0.2
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 0.9/yr over 1.6 season
Talent
0.62/yr blended
Horizon
3.9 control yrs × 0.61 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.