Rosternomics
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March 30, 2009

DETATL

DET won this trade +$0.0M surplus DET won this trade +0.2 WAR
DETDET Dave Dombrowski net +$0.0M net +0.2
received +$19.2M+$19.2M ± $40M expected surplus · +$0.0M realized received 3.7 ± 5 expected · 0.2 realized WAR
Playoff odds: this deal moved DET's 2009 odds 10% → 10% (+0.4 pts) — how trade timing is graded ↗
receives — most valuable first
Josh AndersonOF·26y·L/R
+$19.2M+$19.2M± $40M exp surplusrealized +$0.0M 3.7± 5 exp WARrealized 0.2
Prior
#119 overall draft pick — at the league baseline → 0.21/yr
Evidence
recent form 2.3/yr over 0.4 season
Talent
0.68/yr blended
Horizon
5.5 control yrs × 0.99 age decline
ATLATL Frank Wren net +$0.0M net -0.2
received +$2.4M+$2.4M ± $24M expected surplus · +$0.0M realized received 1.3 ± 3 expected · 0.0 realized WAR
Playoff odds: this deal moved ATL's 2009 odds 52% → 51% (-1.2 pts) — how trade timing is graded ↗
receives — most valuable first
Rudy DarrowP·25y·R/R
+$2.3M+$2.3M± $24M exp surplusrealized +$0.0M 1.3± 3 exp WARrealized 0.0
Prior
#952 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

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.