Rosternomics
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December 20, 1995

HOUWSN

HOU won this trade +$0.8M surplus HOU won this trade +3.2 WAR
HOUHOU Bob Watson net +$0.8M net +3.2
received +$12.0M+$12.0M ± $29M expected surplus · −$0.8M realized received 3.9 ± 4 expected · 3.8 realized WAR
Playoff odds: this deal moved HOU's 1996 odds 12% → 14% (+1.8 pts) — how trade timing is graded ↗
receives — most valuable first
Sean Berry3B·30y·R/R
+$12.2M+$12.2M± $29M exp surplusrealized −$0.8M 3.9± 4 exp WARrealized 3.8
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 2.3/yr over 1.6 season
Talent
1.40/yr blended
Horizon
3.0 control yrs × 0.92 age decline
WSNWSN Kevin Malone net −$0.8M net -3.2
received +$12.8M+$12.8M ± $36M expected surplus · −$1.6M realized received 4.0 ± 4 expected · 0.6 realized WAR
Playoff odds: this deal moved WSN's 1996 odds 18% → 16% (-2.3 pts) — how trade timing is graded ↗
receives — most valuable first
Dave VeresP·29y·R/R
+$11.2M+$11.2M± $24M exp surplusrealized +$0.0M 2.8± 3 exp WARrealized 0.7
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 1.2/yr over 1.6 season
Talent
0.80/yr blended
Horizon
4.0 control yrs × 0.87 age decline
Raúl ChávezC·23y·R/R
+$1.8M+$1.8M± $27M exp surplusrealized −$1.6M 1.2± 3 exp WARrealized -0.1
Prior
no pedigree — 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.