Rosternomics
← Trade Database
March 19, 1991

DETNYY

DET won this trade +$24.0M surplus DET won this trade +3.6 WAR
DETDET Joe McDonald net +$24.0M net +3.6
received −$2.4M−$2.4M ± $21M expected surplus · +$20.8M realized received 0.4 ± 3 expected · 3.2 realized WAR
Playoff odds: this deal moved DET's 1991 odds 28% → 37% (+9 pts) — how trade timing is graded ↗
receives — most valuable first
Mark LeiterP·28y·R/R
−$2.4M−$2.4M± $21M exp surplusrealized +$20.8M 0.4± 3 exp WARrealized 3.2
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form -0.2/yr over 0.3 season
Talent
0.14/yr blended
Horizon
5.5 control yrs × 0.55 age decline
NYYNYY Gene Michael net −$24.0M net -3.6
received −$2.4M−$2.4M ± $38M expected surplus · −$3.2M realized received 0.4 ± 5 expected · -0.4 realized WAR
Playoff odds: this deal moved NYY's 1991 odds 4% → 3% (-1.2 pts) — how trade timing is graded ↗
receives — most valuable first
Torey Lovullo2B·25y·B/R
−$2.4M−$2.4M± $38M exp surplusrealized −$3.2M 0.4± 5 exp WARrealized -0.4
Prior
#131 overall draft pick — at the league baseline → 0.21/yr
Evidence
recent form -0.9/yr over 0.2 season
Talent
0.08/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.