Rosternomics
← Trade Database
May 16, 1989

MINHOU

MIN won this trade +$4.8M surplus MIN won this trade +0.1 WAR
MINMIN Andy MacPhail net +$4.8M net +0.1
received +$0.0M+$0.0M ± $12M expected surplus · +$0.0M realized received 0.2 ± 2 expected · 0.0 realized WAR
Playoff odds: this deal moved MIN's 1989 odds 8% → 8% (-0.1 pts) — how trade timing is graded ↗
receives — most valuable first
Greg Johnson
+$0.3M+$0.3M± $12M exp surplusrealized +$0.0M 0.2± 2 exp WARrealized 0.0
Unidentified minor-league throw-in — valued at the ~0.2 WAR base rate (most produce nothing)
HOUHOU Bill Wood net −$4.8M net -0.1
received −$3.2M−$3.2M ± $27M expected surplus · −$4.8M realized received 0.0 ± 3 expected · -0.1 realized WAR
Playoff odds: this deal moved HOU's 1989 odds 7% → 7% (+0.1 pts) — how trade timing is graded ↗
receives — most valuable first
Mark DavidsonOF·28y·R/R
−$3.0M−$3.0M± $27M exp surplusrealized −$4.8M 0.0± 3 exp WARrealized -0.1
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form -0.2/yr over 1.2 season
Talent
-0.00/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.