Rosternomics
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December 7, 2005

COLSEA

SEA won this trade +$4.8M surplus COL won this trade +2.6 WAR
COLCOL Daniel O'Dowd net −$4.8M net +2.6
received +$8.0M+$8.0M ± $29M expected surplus · −$4.8M realized received 3.0 ± 4 expected · 2.6 realized WAR
Playoff odds: this deal moved COL's 2006 odds 7% → 8% (+1.2 pts) — how trade timing is graded ↗
receives — most valuable first
Yorvit TorrealbaC·27y·R/R
+$8.1M+$8.1M± $29M exp surplusrealized −$4.8M 3.0± 4 exp WARrealized 2.6
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 1.0/yr over 1.2 season
Talent
0.61/yr blended
Horizon
5.0 control yrs × 0.97 age decline
SEASEA Bill Bavasi net +$4.8M net -2.6
received −$0.8M−$0.8M ± $21M expected surplus · +$0.0M realized received 0.6 ± 3 expected · 0.0 realized WAR
Playoff odds: this deal moved SEA's 2006 odds 15% → 13% (-2.2 pts) — how trade timing is graded ↗
receives — most valuable first
Marcos CarvajalP·21y·R/R
−$0.6M−$0.6M± $21M exp surplusrealized +$0.0M 0.6± 3 exp WARrealized 0.0
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form -0.0/yr over 1.0 season
Talent
0.11/yr blended
Horizon
5.0 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.