Rosternomics
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December 10, 1998

KCRNYM

KCR won this trade +$45.6M surplus KCR won this trade +12.8 WAR
KCRKCR Herk Robinson net +$45.6M net +12.8
received +$24.0M+$24.0M ± $30M expected surplus · +$45.6M realized received 4.6 ± 4 expected · 12.8 realized WAR
Playoff odds: this deal moved KCR's 1999 odds 2% → 3% (+1.3 pts) — how trade timing is graded ↗
receives — most valuable first
Joe Randa3B·29y·R/R
+$24.2M+$24.2M± $30M exp surplusrealized +$45.6M 4.6± 4 exp WARrealized 12.8
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 2.4/yr over 1.8 season
Talent
1.55/yr blended
Horizon
3.0 control yrs × 0.98 age decline
NYMNYM Steve Phillips net −$45.6M net -12.8
received +$0.0M+$0.0M ± $5M expected surplus · +$0.0M realized received 0.2 ± 1 expected · 0.0 realized WAR
Playoff odds: this deal moved NYM's 1999 odds 82% → 73% (-9.5 pts) — how trade timing is graded ↗
receives — most valuable first
Juan LeBron
+$0.3M+$0.3M± $5M exp surplusrealized +$0.0M 0.2± 1 exp WARrealized 0.0
Unidentified minor-league throw-in — valued at the ~0.2 WAR base rate (most produce nothing)

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.