Rosternomics
← Trade Database
July 31, 1987

SFGPIT

SFG won this trade +$16.0M surplus SFG won this trade +8.3 WAR
SFGSFG Al Rosen net +$16.0M net +8.3
received +$5.6M+$5.6M ± $35M expected surplus · +$14.4M realized received 1.6 ± 4 expected · 7.9 realized WAR
Playoff odds: this deal moved SFG's 1987 odds 48% → 54% (+5.7 pts) — how trade timing is graded ↗
receives — most valuable first
Don RobinsonP·30y·R/R
+$5.6M+$5.6M± $35M exp surplusrealized +$14.4M 1.6± 4 exp WARrealized 7.9
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 0.9/yr over 1.6 season
Talent
0.62/yr blended
Horizon
4.0 control yrs × 0.64 age decline
PITPIT Syd Thrift net −$16.0M net -8.3
received +$1.6M+$1.6M ± $26M expected surplus · −$1.6M realized received 1.2 ± 3 expected · -0.4 realized WAR
Playoff odds: this deal moved PIT's 1987 odds 44% → 39% (-5.5 pts) — how trade timing is graded ↗
receives — most valuable first
Mackey SasserC·24y·L/R
+$1.8M+$1.8M± $26M exp surplusrealized −$1.6M 1.2± 3 exp WARrealized -0.4
Prior
no pedigree — 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.