Rosternomics
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March 20, 1993

SFGBAL

SFG won this trade +$1.6M surplus SFG won this trade +0.9 WAR
SFGSFG Bob Quinn net +$1.6M net +0.9
received −$3.2M−$3.2M ± $26M expected surplus · +$0.0M realized received 0.3 ± 3 expected · 0.7 realized WAR
Playoff odds: this deal moved SFG's 1993 odds 81% → 80% (-0.4 pts) — how trade timing is graded ↗
receives — most valuable first
Steve Scarsone2B/3B·27y·R/R
−$2.9M−$2.9M± $26M exp surplusrealized +$0.0M 0.3± 3 exp WARrealized 0.7
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form -1.2/yr over 0.1 season
Talent
0.08/yr blended
Horizon
5.5 control yrs × 0.73 age decline
BALBAL Roland Hemond net −$1.6M net -0.9
received +$9.6M+$9.6M ± $30M expected surplus · −$1.6M realized received 1.9 ± 4 expected · -0.2 realized WAR
Playoff odds: this deal moved BAL's 1993 odds 52% → 53% (+0.7 pts) — how trade timing is graded ↗
receives — most valuable first
Mark LeonardOF·28y·L/R
+$9.4M+$9.4M± $30M exp surplusrealized −$1.6M 1.9± 4 exp WARrealized -0.2
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 1.1/yr over 0.7 season
Talent
0.51/yr blended
Horizon
4.0 control yrs × 0.95 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.