Rosternomics
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June 18, 2013

NYMCOL

NYM won this trade +$8.8M surplus NYM won this trade +2.1 WAR
NYMNYM Sandy Alderson net +$8.8M net +2.1
received +$12.8M+$12.8M ± $30M expected surplus · +$8.8M realized received 2.5 ± 4 expected · 2.1 realized WAR
Playoff odds: this deal moved NYM's 2013 odds 14% → 18% (+3.9 pts) — how trade timing is graded ↗
receives — most valuable first
Eric YoungOF·28y·B/R
+$12.8M+$12.8M± $30M exp surplusrealized +$8.8M 2.5± 4 exp WARrealized 2.1
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 1.1/yr over 1.2 season
Talent
0.65/yr blended
Horizon
4.0 control yrs × 0.96 age decline
COLCOL Daniel O'Dowd net −$8.8M net -2.1
received −$4.0M−$4.0M ± $28M expected surplus · +$0.0M realized received 0.1 ± 4 expected · 0.0 realized WAR
Playoff odds: this deal moved COL's 2013 odds 9% → 7% (-2.2 pts) — how trade timing is graded ↗
receives — most valuable first
Collin McHughP·26y·R/R
−$3.9M−$3.9M± $28M exp surplusrealized +$0.0M 0.1± 4 exp WARrealized 0.0
Prior
#554 overall draft pick — at the league baseline → 0.21/yr
Evidence
recent form -0.8/yr over 0.3 season
Talent
0.02/yr blended
Horizon
5.5 control yrs × 0.91 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.