Rosternomics
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November 19, 2015

MILHOU

MIL won this trade +$29.6M surplus MIL won this trade +4.6 WAR
MILMIL Douglas Melvin net +$29.6M net +4.6
received +$0.8M+$0.8M ± $27M expected surplus · +$29.6M realized received 0.8 ± 3 expected · 4.6 realized WAR
Playoff odds: this deal moved MIL's 2016 odds 2% → 3% (+1.9 pts) — how trade timing is graded ↗
receives — most valuable first
Jonathan Villar2B/SS·25y·B/R
+$0.5M+$0.5M± $27M exp surplusrealized +$29.6M 0.8± 3 exp WARrealized 4.6
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 0.1/yr over 0.9 season
Talent
0.16/yr blended
Horizon
5.0 control yrs
HOUHOU Jeff Luhnow net −$29.6M net -4.6
received +$1.6M+$1.6M ± $18M expected surplus · +$0.0M realized received 1.2 ± 2 expected · 0.0 realized WAR
Playoff odds: this deal moved HOU's 2016 odds 75% → 58% (-17.4 pts) — how trade timing is graded ↗
receives — most valuable first
Cy SneedP·23y·R/R
+$1.8M+$1.8M± $18M exp surplusrealized +$0.0M 1.2± 2 exp WARrealized -0.0
Prior
#85 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

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.