Rosternomics
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July 30, 2016

PITWSN

PIT won this trade +$37.6M surplus PIT won this trade +5.6 WAR
PITPIT Neal Huntington net +$37.6M net +5.6
received +$12.0M+$12.0M ± $34M expected surplus · +$44.0M realized received 4.1 ± 4 expected · 6.6 realized WAR
Playoff odds: this deal moved PIT's 2016 odds 10% → 8% (-1.6 pts) — how trade timing is graded ↗
receives — most valuable first
Felipe VázquezP·24y·L/L
+$10.5M+$10.5M± $28M exp surplusrealized +$44.0M 2.9± 4 exp WARrealized 6.6
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 0.9/yr over 1.0 season
Talent
0.52/yr blended
Horizon
5.5 control yrs
Taylor HearnP·21y·L/L
+$1.8M+$1.8M± $18M exp surplusrealized +$0.0M 1.2± 2 exp WARrealized 0.0
Prior
#164 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 −$37.6M net -5.6
received +$8.8M+$8.8M ± $11M expected surplus · +$6.4M realized received 1.1 ± 1 expected · 1.0 realized WAR
Playoff odds: this deal moved WSN's 2016 odds 67% → 71% (+4.1 pts) — how trade timing is graded ↗
receives — most valuable first
Mark MelanconP·31y·R/R
+$9.2M+$9.2M± $11M exp surplusrealized +$6.4M 1.1± 1 exp WARrealized 1.0
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 1.4/yr over 2.6 seasons
Talent
1.06/yr blended
Horizon
1.0 control yr

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.