Rosternomics
← Trade Database
December 8, 1987

NYMBAL

NYM won this trade +$4.8M surplus NYM won this trade +0.2 WAR
NYMNYM Frank Cashen net +$4.8M net +0.2
received +$2.4M+$2.4M ± $33M expected surplus · −$0.8M realized received 1.4 ± 4 expected · 0.2 realized WAR
receives — most valuable first
Blaine BeattyP·24y·L/L
+$1.8M+$1.8M± $30M exp surplusrealized −$0.8M 1.2± 4 exp WARrealized 0.2
Prior
#227 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
Greg Talamantez
+$0.3M+$0.3M± $14M exp surplusrealized +$0.0M 0.2± 2 exp WARrealized 0.0
Unidentified minor-league throw-in — valued at the ~0.2 WAR base rate (most produce nothing)
BALBAL Hank Peters net −$4.8M net -0.2
received −$0.8M−$0.8M ± $15M expected surplus · −$5.6M realized received 0.2 ± 2 expected · 0.0 realized WAR
receives — most valuable first
Doug SiskP·30y·R/R
−$1.2M−$1.2M± $15M exp surplusrealized −$5.6M 0.2± 2 exp WARrealized 0.0
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 0.1/yr over 2.1 seasons
Talent
0.15/yr blended
Horizon
3.0 control yrs × 0.37 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.