Rosternomics
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November 30, 2012

PITOAK

PIT won this trade +$4.0M surplus PIT won this trade +0.3 WAR
PITPIT Neal Huntington net +$4.0M net +0.3
received +$2.4M+$2.4M ± $21M expected surplus · +$0.0M realized received 1.3 ± 3 expected · 0.0 realized WAR
Playoff odds: this deal moved PIT's 2013 odds 36% → 38% (+1.8 pts) — how trade timing is graded ↗
receives — most valuable first
Zack ThorntonP·25y·R/R
+$2.3M+$2.3M± $21M exp surplusrealized +$0.0M 1.3± 3 exp WARrealized 0.0
Prior
#695 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
OAKOAK Billy Beane net −$4.0M net -0.3
received +$0.8M+$0.8M ± $7M expected surplus · −$4.0M realized received 0.4 ± 1 expected · -0.3 realized WAR
Playoff odds: this deal moved OAK's 2013 odds 58% → 56% (-1.9 pts) — how trade timing is graded ↗
receives — most valuable first
Chris ResopP·30y·R/R
+$0.6M+$0.6M± $7M exp surplusrealized −$4.0M 0.4± 1 exp WARrealized -0.3
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 0.3/yr over 2.2 seasons
Talent
0.28/yr blended
Horizon
2.0 control yrs × 0.75 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.