Rosternomics
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July 28, 2017

WSNPHI

WSN won this trade +$13.6M surplus WSN won this trade +4.0 WAR
WSNWSN Michael Rizzo net +$13.6M net +4.0
received +$12.8M+$12.8M ± $11M expected surplus · +$13.6M realized received 1.8 ± 1 expected · 4.0 realized WAR
Playoff odds: this deal moved WSN's 2017 odds 72% → 75% (+2.6 pts) — how trade timing is graded ↗
receives — most valuable first
Howie Kendrick2B·33y·R/R
+$12.8M+$12.8M± $11M exp surplusrealized +$13.6M 1.8± 1 exp WARrealized 4.0
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 2.6/yr over 2.6 seasons
Talent
1.81/yr blended
Horizon
1.0 control yr
PHIPHI Matt Klentak net −$13.6M net -4.0
received +$2.4M+$2.4M ± $21M expected surplus · +$0.0M realized received 1.3 ± 3 expected · 0.0 realized WAR
Playoff odds: this deal moved PHI's 2017 odds 3% → 2% (-0.3 pts) — how trade timing is graded ↗
receives — most valuable first
McKenzie MillsP·21y·L/L
+$2.3M+$2.3M± $21M exp surplusrealized +$0.0M 1.3± 3 exp WARrealized 0.0
Prior
#544 overall draft pick — at the league baseline → 0.21/yr
Evidence
no MLB track record — leans on pedigree
Talent
0.21/yr blended
Horizon
6.0 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.