Rosternomics
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August 22, 2018

CHWPHI

CHW won this trade +$0.8M surplus CHW won this trade +0.1 WAR
CHWCHW Kenny Williams net +$0.8M net +0.1
received +$0.0M+$0.0M ± $5M expected surplus · +$0.0M realized received 0.2 ± 1 expected · 0.0 realized WAR
Playoff odds: this deal moved CHW's 2018 odds 1% → 1% (+0 pts) — how trade timing is graded ↗
receives — most valuable first
Felix Paulino
+$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)
PHIPHI Matt Klentak net −$0.8M net -0.1
received +$2.4M+$2.4M ± $10M expected surplus · −$0.8M realized received 0.7 ± 1 expected · -0.1 realized WAR
Playoff odds: this deal moved PHI's 2018 odds 10% → 9% (-0.2 pts) — how trade timing is graded ↗
receives — most valuable first
Luis AvilánP·28y·L/L
+$2.2M+$2.2M± $10M exp surplusrealized −$0.8M 0.7± 1 exp WARrealized -0.1
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 0.4/yr over 2.6 seasons
Talent
0.36/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.