Rosternomics
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April 1, 2007

SFGSEA

SFG won this trade +$0.0M surplus SFG won this trade +0.1 WAR
SFGSFG Brian Sabean net +$0.0M net +0.1
received −$4.8M−$4.8M ± $36M expected surplus · −$1.6M realized received 0.0 ± 4 expected · -0.1 realized WAR
Playoff odds: this deal moved SFG's 2007 odds 3% → 3% (+0.1 pts) — how trade timing is graded ↗
receives — most valuable first
Travis BlackleyP·24y·L/L
−$4.5M−$4.5M± $36M exp surplusrealized −$1.6M 0.0± 4 exp WARrealized -0.1
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form -3.7/yr over 0.1 season
Talent
-0.05/yr blended
Horizon
5.5 control yrs
SEASEA Bill Bavasi net +$0.0M net -0.1
received −$1.6M−$1.6M ± $14M expected surplus · −$1.6M realized received 0.3 ± 2 expected · -0.2 realized WAR
Playoff odds: this deal moved SEA's 2007 odds 6% → 6% (-0.2 pts) — how trade timing is graded ↗
receives — most valuable first
Jason EllisonOF·29y·R/R
−$1.4M−$1.4M± $14M exp surplusrealized −$1.6M 0.3± 2 exp WARrealized -0.2
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 0.1/yr over 1.2 season
Talent
0.13/yr blended
Horizon
4.0 control yrs × 0.56 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.