Rosternomics
← Trade Database
July 22, 2009

STLBOS

BOS won this trade +$16.8M surplus STL won this trade +0.2 WAR
STLSTL John Mozeliak net −$16.8M net +0.2
received −$9.6M−$27.2M ± $14M expected surplus · −$16.8M realized received 1.6 ± 2 expected · 0.2 realized WAR
Playoff odds: this deal moved STL's 2009 odds 47% → 49% (+1.2 pts) — how trade timing is graded ↗
receives — most valuable first
Julio LugoSS·33y·R/R
−$9.9M−$27.3M± $14M exp surplusrealized −$16.8M 1.6± 2 exp WARrealized 0.2
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 1.7/yr over 2.2 seasons
Talent
1.15/yr blended
Horizon
1.5 control yr × 0.94 age decline
BOSBOS Theo Epstein net +$16.8M net -0.2
received +$11.2M+$11.2M ± $22M expected surplus · +$0.0M realized received 2.3 ± 3 expected · 0.0 realized WAR
Playoff odds: this deal moved BOS's 2009 odds 56% → 55% (-1.2 pts) — how trade timing is graded ↗
receives — most valuable first
Chris DuncanOF·28y·L/R
+$11.4M+$11.4M± $22M exp surplusrealized +$0.0M 2.3± 3 exp WARrealized 0.0
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 1.3/yr over 1.3 season
Talent
0.78/yr blended
Horizon
3.0 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.