Rosternomics
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August 17, 2009

BALDET

BAL won this trade +$20.0M surplus BAL won this trade +0.9 WAR
BALBAL Andy MacPhail net +$20.0M net +0.9
received +$2.4M+$2.4M ± $24M expected surplus · +$0.0M realized received 1.3 ± 3 expected · 0.0 realized WAR
Playoff odds: this deal moved BAL's 2009 odds 0% → 0% (+0.1 pts) — how trade timing is graded ↗
receives — most valuable first
Brett JacobsonP·22y·R/R
+$2.3M+$2.3M± $24M exp surplusrealized +$0.0M 1.3± 3 exp WARrealized 0.0
Prior
#133 overall draft pick — at the league baseline → 0.21/yr
Evidence
no MLB track record — leans on pedigree
Talent
0.21/yr blended
Horizon
6.0 control yrs
DETDET Dave Dombrowski net −$20.0M net -0.9
received +$4.0M−$1.6M ± $14M expected surplus · −$20.0M realized received 2.4 ± 2 expected · -0.9 realized WAR
Playoff odds: this deal moved DET's 2009 odds 12% → 10% (-2 pts) — how trade timing is graded ↗
receives — most valuable first
Aubrey Huff1B·32y·L/R
+$4.1M−$1.5M± $14M exp surplusrealized −$20.0M 2.4± 2 exp WARrealized -0.9
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 2.3/yr over 2.7 seasons
Talent
1.67/yr blended
Horizon
1.5 control yr × 0.96 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.