Rosternomics
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September 14, 1999

NYMKCR

NYM won this trade +$81.6M surplus NYM won this trade +7.7 WAR
NYMNYM Steve Phillips net +$81.6M net +7.7
received +$26.4M+$26.4M ± $40M expected surplus · +$76.8M realized received 3.9 ± 5 expected · 7.0 realized WAR
Playoff odds: this deal moved NYM's 1999 odds 71% → 73% (+1.6 pts) — how trade timing is graded ↗
receives — most valuable first
Glendon RuschP·24y·L/L
+$26.4M+$26.4M± $40M exp surplusrealized +$76.8M 3.9± 5 exp WARrealized 7.0
Prior
Composite #89.0 pedigree (Baseball America #89 (1997)) — fell off 2 lists since, regressed — at the league baseline → 0.21/yr
Evidence
recent form 1.5/yr over 1.6 season
Talent
0.96/yr blended
Horizon
4.0 control yrs
KCRKCR Herk Robinson net −$81.6M net -7.7
received +$1.6M+$1.6M ± $23M expected surplus · −$4.8M realized received 1.2 ± 3 expected · -0.7 realized WAR
Playoff odds: this deal moved KCR's 1999 odds 3% → 3% (-0.2 pts) — how trade timing is graded ↗
receives — most valuable first
Dan MurrayP·25y·R/R
+$1.8M+$1.8M± $23M exp surplusrealized −$4.8M 1.2± 3 exp WARrealized -0.7
Prior
#273 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.