Rosternomics
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June 12, 1993

SEAPHI

SEA won this trade +$2.4M surplus SEA won this trade +0.5 WAR
SEASEA Woody Woodward net +$2.4M net +0.5
received +$3.2M+$3.2M ± $34M expected surplus · +$0.0M realized received 1.3 ± 4 expected · 0.2 realized WAR
Playoff odds: this deal moved SEA's 1993 odds 38% → 40% (+2.8 pts) — how trade timing is graded ↗
receives — most valuable first
Bob AyraultP·27y·R/R
+$3.3M+$3.3M± $34M exp surplusrealized +$0.0M 1.3± 4 exp WARrealized 0.2
Prior
#657 overall draft pick — at the league baseline → 0.21/yr
Evidence
recent form 0.4/yr over 1.0 season
Talent
0.28/yr blended
Horizon
5.0 control yrs × 0.90 age decline
PHIPHI Lee Thomas net −$2.4M net -0.5
received +$1.6M+$1.6M ± $30M expected surplus · −$2.4M realized received 1.2 ± 4 expected · -0.3 realized WAR
Playoff odds: this deal moved PHI's 1993 odds 76% → 74% (-2.2 pts) — how trade timing is graded ↗
receives — most valuable first
Kevin FosterP·24y·R/R
+$1.8M+$1.8M± $30M exp surplusrealized −$2.4M 1.2± 4 exp WARrealized -0.3
Prior
#745 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

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.