Rosternomics
← Trade Database
March 27, 1985

BALMIN

BAL won this trade +$0.8M surplus BAL won this trade +0.5 WAR
BALBAL Hank Peters net +$0.8M net +0.5
received +$1.6M+$1.6M ± $26M expected surplus · +$0.0M realized received 1.2 ± 3 expected · 0.5 realized WAR
Playoff odds: this deal moved BAL's 1985 odds 23% → 23% (-0.6 pts) — how trade timing is graded ↗
receives — most valuable first
Brad HavensP·25y·L/L
+$1.8M+$1.8M± $26M exp surplusrealized +$0.0M 1.2± 3 exp WARrealized 0.5
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
MINMIN Howard Fox net −$0.8M net -0.5
received +$1.6M+$1.6M ± $26M expected surplus · −$0.8M realized received 1.2 ± 3 expected · 0.0 realized WAR
Playoff odds: this deal moved MIN's 1985 odds 12% → 12% (+0.4 pts) — how trade timing is graded ↗
receives — most valuable first
Mark BrownP·25y·B/R
+$1.8M+$1.8M± $26M exp surplusrealized −$0.8M 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

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.