Rosternomics
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July 31, 2019

ANAHOU

ANA won this trade +$11.2M surplus ANA won this trade +3.7 WAR
ANAANA Billy Eppler net +$11.2M net +3.7
received +$31.2M+$31.2M ± $42M expected surplus · +$11.2M realized received 6.5 ± 5 expected · 3.7 realized WAR
Playoff odds: this deal moved ANA's 2019 odds 2% → 2% (-0.1 pts) — how trade timing is graded ↗
receives — most valuable first
Max StassiC·28y·R/R
+$31.3M+$31.3M± $42M exp surplusrealized +$11.2M 6.5± 5 exp WARrealized 3.7
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 3.8/yr over 0.8 season
Talent
1.64/yr blended
Horizon
4.0 control yrs × 0.99 age decline
HOUHOU Jeff Luhnow net −$11.2M net -3.7
received +$0.8M+$0.8M ± $6M expected surplus · +$0.0M realized received 0.4 ± 1 expected · 0.0 realized WAR
Playoff odds: this deal moved HOU's 2019 odds 100% → 100% (+0 pts) — how trade timing is graded ↗
receives — most valuable first
Raider Uceta
+$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)
Rainier Rivas
+$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)

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.