Rosternomics
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August 31, 1998

SEACLE

SEA won this trade +$21.6M surplus SEA won this trade +6.1 WAR
SEASEA Woody Woodward net +$21.6M net +6.1
received −$4.8M−$4.8M ± $32M expected surplus · +$12.0M realized received 0.0 ± 4 expected · 5.6 realized WAR
Playoff odds: this deal moved SEA's 1998 odds 47% → 52% (+5 pts) — how trade timing is graded ↗
receives — most valuable first
David Bell2B/3B·25y·R/R
−$4.5M−$4.5M± $32M exp surplusrealized +$12.0M 0.0± 4 exp WARrealized 5.6
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form -1.3/yr over 0.8 season
Talent
-0.41/yr blended
Horizon
5.5 control yrs
CLECLE John Hart net −$21.6M net -6.1
received −$2.4M−$3.2M ± $10M expected surplus · −$9.6M realized received 0.9 ± 1 expected · -0.5 realized WAR
Playoff odds: this deal moved CLE's 1998 odds 59% → 54% (-4.9 pts) — how trade timing is graded ↗
receives — most valuable first
Joey Cora2B·33y·B/R
−$2.6M−$3.4M± $10M exp surplusrealized −$9.6M 0.9± 1 exp WARrealized -0.5
Prior
league baseline (track record outweighs draft pedigree) → 0.24/yr
Evidence
recent form 0.9/yr over 2.4 seasons
Talent
0.65/yr blended
Horizon
1.5 control yr × 0.89 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.