Rosternomics
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June 9, 1996

NYMSEA

NYM won this trade +$2.4M surplus NYM won this trade +0.3 WAR
NYMNYM Joe McIlvaine net +$2.4M net +0.3
received +$2.4M+$2.4M ± $30M expected surplus · +$0.0M realized received 1.3 ± 4 expected · 0.0 realized WAR
Playoff odds: this deal moved NYM's 1996 odds 23% → 24% (+1.1 pts) — how trade timing is graded ↗
receives — most valuable first
Randy Vickers3B·20y·R/R
+$2.3M+$2.3M± $30M exp surplusrealized +$0.0M 1.3± 4 exp WARrealized 0.0
Prior
#861 overall draft pick — at the league baseline → 0.21/yr
Evidence
no MLB track record — leans on pedigree
Talent
0.21/yr blended
Horizon
6.0 control yrs
SEASEA Woody Woodward net −$2.4M net -0.3
received +$0.0M+$0.0M ± $12M expected surplus · −$2.4M realized received 0.4 ± 2 expected · -0.3 realized WAR
Playoff odds: this deal moved SEA's 1996 odds 83% → 82% (-0.9 pts) — how trade timing is graded ↗
receives — most valuable first
Blas MinorP·30y·R/R
−$0.1M−$0.1M± $12M exp surplusrealized −$2.4M 0.4± 2 exp WARrealized -0.3
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 0.3/yr over 1.8 season
Talent
0.26/yr blended
Horizon
3.0 control yrs × 0.49 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.