Rosternomics
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December 11, 2018

STLTEX

STL won this trade +$0.8M surplus STL won this trade +0.2 WAR
STLSTL John Mozeliak net +$0.8M net +0.2
received −$4.0M−$4.0M ± $25M expected surplus · −$0.8M realized received 0.0 ± 3 expected · -0.1 realized WAR
Playoff odds: this deal moved STL's 2019 odds 22% → 23% (+0.8 pts) — how trade timing is graded ↗
receives — most valuable first
Drew RobinsonOF·27y·L/R
−$3.7M−$3.7M± $25M exp surplusrealized −$0.8M 0.0± 3 exp WARrealized -0.1
Prior
#136 overall draft pick — at the league baseline → 0.21/yr
Evidence
recent form -0.5/yr over 0.5 season
Talent
-0.01/yr blended
Horizon
5.0 control yrs
TEXTEX Jon Daniels net −$0.8M net -0.2
received +$4.0M+$4.0M ± $17M expected surplus · −$1.6M realized received 1.8 ± 2 expected · -0.3 realized WAR
Playoff odds: this deal moved TEX's 2019 odds 2% → 1% (-0.1 pts) — how trade timing is graded ↗
receives — most valuable first
Patrick Wisdom3B·27y·R/R
+$3.9M+$3.9M± $17M exp surplusrealized −$1.6M 1.8± 2 exp WARrealized -0.3
Prior
#52 overall draft pick — at the league baseline → 0.21/yr
Evidence
recent form 1.3/yr over 0.2 season
Talent
0.37/yr blended
Horizon
5.5 control yrs × 0.89 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.