Rosternomics
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June 9, 2016

CHCOAK

CHC won this trade +$3.2M surplus CHC won this trade +0.8 WAR
CHCCHC Theo Epstein net +$3.2M net +0.8
received +$6.4M+$6.4M ± $11M expected surplus · +$1.6M realized received 1.5 ± 1 expected · 0.6 realized WAR
Playoff odds: this deal moved CHC's 2016 odds 93% → 95% (+1.1 pts) — how trade timing is graded ↗
receives — most valuable first
Chris CoghlanOF·31y·L/R
+$6.4M+$6.4M± $11M exp surplusrealized +$1.6M 1.5± 1 exp WARrealized 0.6
Prior
league baseline (track record outweighs draft pedigree) → 0.22/yr
Evidence
recent form 2.3/yr over 2.0 seasons
Talent
1.49/yr blended
Horizon
1.0 control yr
OAKOAK Billy Beane net −$3.2M net -0.8
received +$1.6M+$1.6M ± $17M expected surplus · −$1.6M realized received 1.3 ± 2 expected · -0.2 realized WAR
Playoff odds: this deal moved OAK's 2016 odds 1% → 1% (-0.1 pts) — how trade timing is graded ↗
receives — most valuable first
Arismendy Alcántara2B/OF·24y·B/R
+$1.4M+$1.4M± $17M exp surplusrealized −$1.6M 1.3± 2 exp WARrealized -0.2
Prior
Composite #100.0 pedigree (Baseball America #100 (2014)) — fell off 2 lists since, regressed — at the league baseline → 0.21/yr
Evidence
recent form 0.3/yr over 0.4 season
Talent
0.24/yr blended
Horizon
5.5 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.