Rosternomics
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July 29, 2013

ANAATL

ANA won this trade +$4.0M surplus ANA won this trade +0.1 WAR
ANAANA Jerry Dipoto net +$4.0M net +0.1
received +$2.4M+$2.4M ± $18M expected surplus · +$0.0M realized received 1.2 ± 2 expected · 0.3 realized WAR
Playoff odds: this deal moved ANA's 2013 odds 10% → 9% (-0.8 pts) — how trade timing is graded ↗
receives — most valuable first
Cory RasmusP·25y·R/R
+$2.7M+$2.7M± $18M exp surplusrealized +$0.0M 1.2± 2 exp WARrealized 0.3
Prior
#38 overall draft pick → 0.25/yr
Evidence
no MLB track record — leans on pedigree
Talent
0.25/yr blended
Horizon
5.0 control yrs
ATLATL Frank Wren net −$4.0M net -0.1
received −$4.0M−$4.0M ± $4M expected surplus · −$4.0M realized received 0.3 ± 0 expected · 0.2 realized WAR
Playoff odds: this deal moved ATL's 2013 odds 60% → 62% (+2.1 pts) — how trade timing is graded ↗
receives — most valuable first
Scott DownsP·37y·L/L
−$3.6M−$3.6M± $4M exp surplusrealized −$4.0M 0.3± 0 exp WARrealized 0.2
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 0.6/yr over 2.8 seasons
Talent
0.50/yr blended
Horizon
0.6 control yr

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.