Rosternomics
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July 31, 2018

BALMIL

BAL won this trade +$26.4M surplus BAL won this trade +4.5 WAR
BALBAL Dan Duquette net +$26.4M net +4.5
received +$15.2M+$15.2M ± $30M expected surplus · +$23.2M realized received 4.4 ± 4 expected · 4.4 realized WAR
Playoff odds: this deal moved BAL's 2018 odds 0% → 0% (+0 pts) — how trade timing is graded ↗
receives — most valuable first
Jonathan Villar2B/SS·27y·B/R
+$8.3M+$8.3M± $20M exp surplusrealized +$24.0M 2.9± 2 exp WARrealized 4.6
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 1.5/yr over 1.8 season
Talent
0.97/yr blended
Horizon
3.0 control yrs
Luis OrtizP·22y·R/R
+$6.2M+$6.2M± $21M exp surplusrealized −$0.8M 1.3± 3 exp WARrealized -0.2
Prior
Composite #79.0 prospect (Baseball America #79 (2017)) — fell off 1 list since, regressed → 0.24/yr
Evidence
no MLB track record — leans on pedigree
Talent
0.24/yr blended
Horizon
5.5 control yrs
Jean Carmona
+$0.3M+$0.3M± $5M exp surplusrealized +$0.0M 0.2± 1 exp WARrealized 0.0
Unidentified minor-league throw-in — valued at the ~0.2 WAR base rate (most produce nothing)
MILMIL David Stearns net −$26.4M net -4.5
received +$40.8M+$40.8M ± $26M expected surplus · −$3.2M realized received 6.2 ± 3 expected · -0.1 realized WAR
Playoff odds: this deal moved MIL's 2018 odds 63% → 57% (-6.6 pts) — how trade timing is graded ↗
receives — most valuable first
Jonathan Schoop2B·26y·R/R
+$41.0M+$41.0M± $26M exp surplusrealized −$3.2M 6.2± 3 exp WARrealized -0.1
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 3.5/yr over 2.1 seasons
Talent
3.08/yr blended
Horizon
2.0 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.