Rosternomics
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July 26, 2008

CLESTL

CLE won this trade +$2.4M surplus CLE won this trade +0.5 WAR
CLECLE Mark Shapiro net +$2.4M net +0.5
received +$0.8M+$0.8M ± $20M expected surplus · +$2.4M realized received 0.8 ± 2 expected · 0.5 realized WAR
Playoff odds: this deal moved CLE's 2008 odds 26% → 28% (+2 pts) — how trade timing is graded ↗
receives — most valuable first
Anthony ReyesP·26y·R/R
+$1.2M+$1.2M± $20M exp surplusrealized +$2.4M 0.8± 2 exp WARrealized 0.5
Prior
Composite #41.0 pedigree (Baseball America #41 (2006)) — fell off 2 lists since, regressed — at the league baseline → 0.21/yr
Evidence
recent form 0.2/yr over 1.3 season
Talent
0.20/yr blended
Horizon
4.0 control yrs
STLSTL John Mozeliak net −$2.4M net -0.5
received +$1.6M+$1.6M ± $22M expected surplus · +$0.0M realized received 1.2 ± 3 expected · 0.0 realized WAR
Playoff odds: this deal moved STL's 2008 odds 59% → 57% (-2.5 pts) — how trade timing is graded ↗
receives — most valuable first
Luis PerdomoP·24y·R/R
+$1.8M+$1.8M± $22M exp surplusrealized +$0.0M 1.2± 3 exp WARrealized 0.0
Prior
no pedigree — 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.