Rosternomics
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July 31, 2013

HOUKCR

HOU won this trade +$2.4M surplus HOU won this trade +0.1 WAR
HOUHOU Jeff Luhnow net +$2.4M net +0.1
received +$0.0M+$0.0M ± $6M expected surplus · +$0.0M realized received 0.2 ± 1 expected · 0.0 realized WAR
Playoff odds: this deal moved HOU's 2013 odds 0% → 0% (-0 pts) — how trade timing is graded ↗
receives — most valuable first
Kyle Smith
+$0.3M+$0.3M± $6M 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)
KCRKCR Dayton Moore net −$2.4M net -0.1
received +$22.4M+$22.4M ± $31M expected surplus · −$2.4M realized received 4.1 ± 4 expected · -0.1 realized WAR
Playoff odds: this deal moved KCR's 2013 odds 21% → 24% (+2.7 pts) — how trade timing is graded ↗
receives — most valuable first
Justin MaxwellOF·29y·R/R
+$22.0M+$22.0M± $31M exp surplusrealized −$2.4M 4.1± 4 exp WARrealized -0.1
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 2.1/yr over 1.1 season
Talent
1.11/yr blended
Horizon
4.0 control yrs × 0.92 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.