Rosternomics
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August 1, 2016

ANACHC

ANA won this trade +$8.0M surplus ANA won this trade +0.2 WAR
ANAANA Billy Eppler net +$8.0M net +0.2
received +$0.0M+$0.0M ± $6M expected surplus · +$0.0M realized received 0.2 ± 1 expected · 0.0 realized WAR
Playoff odds: this deal moved ANA's 2016 odds 2% → 2% (+0.1 pts) — how trade timing is graded ↗
receives — most valuable first
Jesus Castillo
+$0.3M+$0.3M± $6M 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)
CHCCHC Theo Epstein net −$8.0M net -0.2
received −$2.4M−$6.4M ± $8M expected surplus · −$8.0M realized received 0.9 ± 1 expected · -0.2 realized WAR
Playoff odds: this deal moved CHC's 2016 odds 95% → 95% (-0.3 pts) — how trade timing is graded ↗
receives — most valuable first
Joe SmithP·32y·R/R
−$2.2M−$6.2M± $8M exp surplusrealized −$8.0M 0.9± 1 exp WARrealized -0.2
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 0.8/yr over 2.8 seasons
Talent
0.63/yr blended
Horizon
1.5 control yr × 0.91 age decline

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.