Rosternomics
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June 1, 1999

BALMIL

BAL won this trade +$1.6M surplus BAL won this trade +0.0 WAR
BALBAL Frank Wren net +$1.6M net +0.0
received +$0.8M+$0.8M ± $14M expected surplus · +$0.0M realized received 0.8 ± 2 expected · 0.0 realized WAR
Playoff odds: this deal moved BAL's 1999 odds 44% → 45% (+0.8 pts) — how trade timing is graded ↗
receives — most valuable first
Todd DunnDH/OF·28y·R/R
+$1.2M+$1.2M± $14M exp surplusrealized +$0.0M 0.8± 2 exp WARrealized 0.0
Prior
#35 overall draft pick → 0.27/yr
Evidence
recent form -0.1/yr over 0.2 season
Talent
0.22/yr blended
Horizon
4.0 control yrs × 0.89 age decline
MILMIL Sal Bando net −$1.6M net +0.0
received +$2.4M+$2.4M ± $14M expected surplus · −$1.6M realized received 0.7 ± 2 expected · 0.0 realized WAR
Playoff odds: this deal moved MIL's 1999 odds 2% → 2% (-0.1 pts) — how trade timing is graded ↗
receives — most valuable first
Lyle MoutonOF·30y·R/R
+$2.4M+$2.4M± $14M exp surplusrealized −$1.6M 0.7± 2 exp WARrealized 0.0
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 0.6/yr over 0.9 season
Talent
0.36/yr blended
Horizon
3.0 control yrs × 0.69 age decline

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.