Rosternomics
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July 7, 2005

BOSCLE

BOS won this trade +$6.4M surplus BOS won this trade +2.1 WAR
BOSBOS Theo Epstein net +$6.4M net +2.1
received +$0.8M+$0.8M ± $15M expected surplus · −$1.6M realized received 1.2 ± 2 expected · 1.2 realized WAR
Playoff odds: this deal moved BOS's 2005 odds 49% → 50% (+1.3 pts) — how trade timing is graded ↗
receives — most valuable first
Alex Cora2B/SS·29y·L/R
+$0.4M+$0.4M± $15M exp surplusrealized −$1.6M 1.2± 2 exp WARrealized 1.2
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 1.2/yr over 2.3 seasons
Talent
0.83/yr blended
Horizon
1.5 control yr
CLECLE Mark Shapiro net −$6.4M net -2.1
received +$8.8M+$8.8M ± $24M expected surplus · −$8.0M realized received 2.6 ± 3 expected · -0.9 realized WAR
Playoff odds: this deal moved CLE's 2005 odds 89% → 88% (-0.5 pts) — how trade timing is graded ↗
receives — most valuable first
Ramón Vázquez3B/SS·28y·L/R
+$8.6M+$8.6M± $24M exp surplusrealized −$8.0M 2.6± 3 exp WARrealized -0.9
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 1.5/yr over 1.2 season
Talent
0.86/yr blended
Horizon
3.0 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.