Rosternomics
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September 26, 2016

PITWSN

WSN won this trade +$0.8M surplus PIT won this trade +0.1 WAR
PITPIT Neal Huntington net −$0.8M net +0.1
received +$1.6M+$1.6M ± $18M expected surplus · −$0.8M realized received 1.2 ± 2 expected · 0.1 realized WAR
receives — most valuable first
Christopher Bostick2B/OF·23y·R/R
+$1.8M+$1.8M± $18M exp surplusrealized −$0.8M 1.2± 2 exp WARrealized 0.1
Prior
#1336 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
WSNWSN Michael Rizzo net +$0.8M net -0.1
received +$1.6M+$1.6M ± $18M expected surplus · +$0.0M realized received 1.2 ± 2 expected · 0.0 realized WAR
receives — most valuable first
Taylor GushueC/1B·22y·B/R
+$1.8M+$1.8M± $18M exp surplusrealized +$0.0M 1.2± 2 exp WARrealized 0.0
Prior
#131 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.