Rosternomics
← Trade Database
January 28, 2008

CHWBOS

CHW won this trade +$1.6M surplus CHW won this trade +0.1 WAR
CHWCHW Kenny Williams net +$1.6M net +0.1
received +$2.4M+$2.4M ± $23M expected surplus · +$0.0M realized received 1.4 ± 3 expected · 0.0 realized WAR
Playoff odds: this deal moved CHW's 2008 odds 40% → 40% (+0.5 pts) — how trade timing is graded ↗
receives — most valuable first
Miguel SocolovichP·21y·R/R
+$1.8M+$1.8M± $22M exp surplusrealized +$0.0M 1.2± 3 exp WARrealized 0.0
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
Willy Mota
+$0.3M+$0.3M± $7M exp surplusrealized +$0.0M 0.2± 1 exp WARrealized 0.0
Unidentified minor-league throw-in — valued at the ~0.2 WAR base rate (most produce nothing)
BOSBOS Theo Epstein net −$1.6M net -0.1
received +$0.8M+$0.8M ± $20M expected surplus · −$1.6M realized received 0.7 ± 2 expected · -0.1 realized WAR
Playoff odds: this deal moved BOS's 2008 odds 90% → 90% (-0.2 pts) — how trade timing is graded ↗
receives — most valuable first
David AardsmaP·26y·R/R
+$0.6M+$0.6M± $20M exp surplusrealized −$1.6M 0.7± 2 exp WARrealized -0.1
Prior
#22 overall draft pick → 0.38/yr
Evidence
recent form 0.0/yr over 1.6 season
Talent
0.17/yr blended
Horizon
4.0 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.