Rosternomics
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December 16, 2009

SEAPHI

SEA won this trade +$62.4M surplus SEA won this trade +5.1 WAR
SEASEA Jack Zduriencik net +$62.4M net +5.1
received +$61.6M+$41.6M ± $21M expected surplus · +$55.2M realized received 5.0 ± 3 expected · 4.1 realized WAR
Playoff odds: this deal moved SEA's 2010 odds 0% → 1% (+0.3 pts) — how trade timing is graded ↗
receives — most valuable first
Cliff LeeP·31y·L/L
+$61.4M+$41.4M± $21M exp surplusrealized +$55.2M 5.0± 3 exp WARrealized 4.1
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 4.9/yr over 2.5 seasons
Talent
3.38/yr blended
Horizon
1.5 control yr × 0.98 age decline
PHIPHI Ruben Amaro net −$62.4M net -5.1
received +$19.2M+$19.2M ± $54M expected surplus · −$7.2M realized received 6.4 ± 7 expected · -1.0 realized WAR
Playoff odds: this deal moved PHI's 2010 odds 62% → 39% (-23.5 pts) — how trade timing is graded ↗
receives — most valuable first
Phillippe AumontP·21y·L/R
+$15.0M+$15.0M± $44M exp surplusrealized −$4.0M 3.9± 6 exp WARrealized -0.4
Prior
#11 overall draft pick → 0.71/yr
Evidence
no MLB track record — leans on pedigree
Talent
0.71/yr blended
Horizon
5.5 control yrs
Tyson GilliesCF·21y·L/R
+$2.3M+$2.3M± $23M exp surplusrealized +$0.0M 1.3± 3 exp WARrealized 0.0
Prior
#741 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
J. C. RamírezP·21y·R/R
+$1.8M+$1.8M± $22M exp surplusrealized −$3.2M 1.2± 3 exp WARrealized -0.6
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.