Rosternomics
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March 23, 2019

NYYCOL

NYY won this trade +$20.8M surplus NYY won this trade +3.2 WAR
NYYNYY Brian Cashman net +$20.8M net +3.2
received −$4.8M−$4.8M ± $24M expected surplus · +$20.8M realized received 0.0 ± 3 expected · 3.2 realized WAR
Playoff odds: this deal moved NYY's 2019 odds 72% → 84% (+11.7 pts) — how trade timing is graded ↗
receives — most valuable first
Mike TauchmanOF·28y·L/L
−$4.5M−$4.5M± $24M exp surplusrealized +$20.8M 0.0± 3 exp WARrealized 3.2
Prior
#289 overall draft pick — at the league baseline → 0.21/yr
Evidence
recent form -1.9/yr over 0.3 season
Talent
-0.19/yr blended
Horizon
5.5 control yrs
COLCOL Jeff Bridich net −$20.8M net -3.2
received +$1.6M+$1.6M ± $20M expected surplus · +$0.0M realized received 1.2 ± 2 expected · 0.0 realized WAR
Playoff odds: this deal moved COL's 2019 odds 1% → 0% (-0.5 pts) — how trade timing is graded ↗
receives — most valuable first
Phillip DiehlP·24y·L/L
+$1.8M+$1.8M± $20M exp surplusrealized +$0.0M 1.2± 2 exp WARrealized -0.0
Prior
#818 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.