Rosternomics
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August 15, 1995

SEAKCR

SEA won this trade +$1.6M surplus SEA won this trade +0.3 WAR
SEASEA Woody Woodward net +$1.6M net +0.3
received −$0.8M−$3.2M ± $6M expected surplus · +$0.0M realized received 0.1 ± 1 expected · 0.2 realized WAR
Playoff odds: this deal moved SEA's 1995 odds 71% → 72% (+0.7 pts) — how trade timing is graded ↗
receives — most valuable first
Vince ColemanOF·33y·B/R
−$0.6M−$2.9M± $6M exp surplusrealized +$0.0M 0.1± 1 exp WARrealized 0.2
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 0.1/yr over 1.9 season
Talent
0.12/yr blended
Horizon
1.5 control yr × 0.67 age decline
KCRKCR Herk Robinson net −$1.6M net -0.3
received +$6.4M+$6.4M ± $42M expected surplus · −$1.6M realized received 2.2 ± 5 expected · -0.1 realized WAR
Playoff odds: this deal moved KCR's 1995 odds 5% → 4% (-0.2 pts) — how trade timing is graded ↗
receives — most valuable first
Jim ConverseP·23y·L/R
+$6.8M+$6.8M± $42M exp surplusrealized −$1.6M 2.2± 5 exp WARrealized -0.1
Prior
#417 overall draft pick — at the league baseline → 0.21/yr
Evidence
recent form 0.8/yr over 0.5 season
Talent
0.40/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.