Rosternomics
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August 19, 2010

HOUSTL

HOU won this trade +$8.8M surplus HOU won this trade +0.4 WAR
HOUHOU Ed Wade net +$8.8M net +0.4
received +$1.6M+$1.6M ± $22M expected surplus · −$2.4M realized received 1.2 ± 3 expected · -0.1 realized WAR
Playoff odds: this deal moved HOU's 2010 odds 1% → 1% (+0.1 pts) — how trade timing is graded ↗
receives — most valuable first
David CarpenterP·24y·R/R
+$1.8M+$1.8M± $22M exp surplusrealized −$2.4M 1.2± 3 exp WARrealized -0.1
Prior
#376 overall draft pick — at the league baseline → 0.21/yr
Evidence
no MLB track record — leans on pedigree
Talent
0.21/yr blended
Horizon
5.5 control yrs
STLSTL John Mozeliak net −$8.8M net -0.4
received −$0.8M−$1.6M ± $12M expected surplus · −$11.2M realized received 1.6 ± 2 expected · -0.5 realized WAR
Playoff odds: this deal moved STL's 2010 odds 25% → 22% (-2.3 pts) — how trade timing is graded ↗
receives — most valuable first
Pedro Feliz3B·35y·R/R
−$1.0M−$1.8M± $12M exp surplusrealized −$11.2M 1.6± 2 exp WARrealized -0.5
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 1.6/yr over 2.7 seasons
Talent
1.15/yr blended
Horizon
1.5 control yr × 0.92 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.