Rosternomics
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July 31, 2019

NYYCOL

NYY won this trade +$1.6M surplus NYY won this trade +0.2 WAR
NYYNYY Brian Cashman net +$1.6M net +0.2
received −$3.2M−$3.2M ± $6M expected surplus · +$0.0M realized received 0.2 ± 1 expected · 0.0 realized WAR
Playoff odds: this deal moved NYY's 2019 odds 83% → 84% (+0.6 pts) — how trade timing is graded ↗
receives — most valuable first
Alfredo GarciaP·45y·R/R
−$3.4M−$3.4M± $6M exp surplusrealized +$0.0M 0.2± 1 exp WARrealized 0.0
Prior
#530 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 × 0.17 age decline
COLCOL Jeff Bridich net −$1.6M net -0.2
received +$0.0M+$0.0M ± $21M expected surplus · −$1.6M realized received 0.9 ± 3 expected · -0.2 realized WAR
Playoff odds: this deal moved COL's 2019 odds 0% → 0% (-0 pts) — how trade timing is graded ↗
receives — most valuable first
Joe HarveyP·27y·R/R
+$0.2M+$0.2M± $21M exp surplusrealized −$1.6M 0.9± 3 exp WARrealized -0.2
Prior
#572 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 × 0.79 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.