Rosternomics
← Trade Database
August 29, 1989

WSNNYY

NYY won this trade +$0.8M surplus WSN won this trade +1.1 WAR
WSNWSN Dave Dombrowski net −$0.8M net +1.1
received +$34.4M+$34.4M ± $18M expected surplus · −$9.6M realized received 3.6 ± 2 expected · -0.1 realized WAR
Playoff odds: this deal moved WSN's 1989 odds 12% → 12% (+0.3 pts) — how trade timing is graded ↗
receives — most valuable first
John CandelariaP·35y·L/L
+$34.2M+$34.2M± $18M exp surplusrealized −$9.6M 3.6± 2 exp WARrealized -0.1
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 3.6/yr over 1.8 season
Talent
2.28/yr blended
Horizon
1.7 control yr × 0.96 age decline
NYYNYY Bob Quinn net +$0.8M net -1.1
received +$1.6M+$1.6M ± $30M expected surplus · −$8.8M realized received 1.2 ± 4 expected · -1.2 realized WAR
Playoff odds: this deal moved NYY's 1989 odds 10% → 10% (-0.3 pts) — how trade timing is graded ↗
receives — most valuable first
Mike Blowers3B·24y·R/R
+$1.8M+$1.8M± $30M exp surplusrealized −$8.8M 1.2± 4 exp WARrealized -1.2
Prior
#252 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.