Rosternomics
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December 20, 1993

MIAOAK

MIA won this trade +$12.0M surplus MIA won this trade +2.4 WAR
MIAMIA Dave Dombrowski net +$12.0M net +2.4
received +$8.8M+$8.8M ± $28M expected surplus · +$11.2M realized received 2.0 ± 4 expected · 2.4 realized WAR
Playoff odds: this deal moved MIA's 1994 odds 2% → 2% (+0.3 pts) — how trade timing is graded ↗
receives — most valuable first
Kurt Abbott2B/SS·25y·R/R
+$8.7M+$8.7M± $28M exp surplusrealized +$11.2M 2.0± 4 exp WARrealized 2.4
Prior
#398 overall draft pick — at the league baseline → 0.21/yr
Evidence
recent form 1.8/yr over 0.1 season
Talent
0.36/yr blended
Horizon
5.5 control yrs
OAKOAK Sandy Alderson net −$12.0M net -2.4
received +$1.6M+$1.6M ± $29M expected surplus · −$0.8M realized received 1.2 ± 4 expected · 0.0 realized WAR
Playoff odds: this deal moved OAK's 1994 odds 3% → 3% (-0.4 pts) — how trade timing is graded ↗
receives — most valuable first
Kerwin MooreOF·23y·B/R
+$1.8M+$1.8M± $29M exp surplusrealized −$0.8M 1.2± 4 exp WARrealized -0.0
Prior
#413 overall draft pick — at the 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.