Rosternomics
← Trade Database
December 7, 1988

NYMMIN

NYM won this trade +$11.2M surplus NYM won this trade +0.6 WAR
NYMNYM Frank Cashen net +$11.2M net +0.6
received +$20.0M+$20.0M ± $61M expected surplus · +$0.0M realized received 6.6 ± 8 expected · 0.0 realized WAR
Playoff odds: this deal moved NYM's 1989 odds 70% → 73% (+3 pts) — how trade timing is graded ↗
receives — most valuable first
Jeff BumgarnerP·22y·R/R
+$15.2M+$15.2M± $41M exp surplusrealized +$0.0M 4.0± 5 exp WARrealized 0.0
Prior
#13 overall draft pick → 0.67/yr
Evidence
no MLB track record — leans on pedigree
Talent
0.67/yr blended
Horizon
6.0 control yrs
Steve GasserP·21y·R/R
+$2.3M+$2.3M± $32M exp surplusrealized +$0.0M 1.3± 4 exp WARrealized 0.0
Prior
#41 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
Toby NivensP·22y·R/R
+$2.3M+$2.3M± $32M exp surplusrealized +$0.0M 1.3± 4 exp WARrealized 0.0
Prior
#615 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
MINMIN Andy MacPhail net −$11.2M net -0.6
received +$15.2M+$15.2M ± $25M expected surplus · −$11.2M realized received 3.5 ± 3 expected · -0.6 realized WAR
Playoff odds: this deal moved MIN's 1989 odds 9% → 8% (-1.1 pts) — how trade timing is graded ↗
receives — most valuable first
Wally Backman2B·29y·B/R
+$14.9M+$14.9M± $22M exp surplusrealized −$11.2M 3.3± 3 exp WARrealized -0.6
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 2.7/yr over 1.7 season
Talent
1.67/yr blended
Horizon
2.0 control yrs
Mike Santiago
+$0.3M+$0.3M± $12M 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)

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.