Rosternomics
← Trade Database
December 7, 1988

ANAMIL

ANA won this trade +$0.0M surplus ANA won this trade +0.9 WAR
ANAANA Mike Port net +$0.0M net +0.9
received +$6.4M+$6.4M ± $22M expected surplus · −$7.2M realized received 2.3 ± 3 expected · 0.1 realized WAR
Playoff odds: this deal moved ANA's 1989 odds 52% → 55% (+3.4 pts) — how trade timing is graded ↗
receives — most valuable first
Bill SchroederC·30y·R/R
+$6.5M+$6.5M± $22M exp surplusrealized −$7.2M 2.3± 3 exp WARrealized 0.1
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 1.4/yr over 1.0 season
Talent
0.75/yr blended
Horizon
4.0 control yrs × 0.75 age decline
MILMIL Harry Dalton net +$0.0M net -0.9
received −$4.8M−$4.8M ± $30M expected surplus · −$7.2M realized received 0.0 ± 4 expected · -0.8 realized WAR
Playoff odds: this deal moved MIL's 1989 odds 3% → 3% (-0.4 pts) — how trade timing is graded ↗
receives — most valuable first
Gus Polidor3B/SS·27y·R/R
−$4.5M−$4.5M± $30M exp surplusrealized −$7.2M 0.0± 4 exp WARrealized -0.8
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form -1.8/yr over 0.7 season
Talent
-0.49/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.