Rosternomics
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December 2, 2020

LADMIL

MIL won this trade +$0.8M surplus LAD won this trade +0.6 WAR
LADLAD Andrew Friedman net −$0.8M net +0.6
received +$1.6M+$1.6M ± $8M expected surplus · −$0.8M realized received 0.5 ± 1 expected · 0.6 realized WAR
Playoff odds: this deal moved LAD's 2021 odds 97% → 97% (+0.4 pts) — how trade timing is graded ↗
receives — most valuable first
Corey KnebelP·29y·R/R
+$1.5M+$1.5M± $8M exp surplusrealized −$0.8M 0.5± 1 exp WARrealized 0.6
Prior
league baseline (track record outweighs draft pedigree) → 0.22/yr
Evidence
recent form 0.7/yr over 1.5 season
Talent
0.47/yr blended
Horizon
1.0 control yr
MILMIL David Stearns net +$0.8M net -0.6
received +$0.0M+$0.0M ± $6M expected surplus · +$0.0M realized received 0.2 ± 1 expected · 0.0 realized WAR
Playoff odds: this deal moved MIL's 2021 odds 54% → 50% (-3.4 pts) — how trade timing is graded ↗
receives — most valuable first
Leo Crawford
+$0.3M+$0.3M± $6M exp surplusrealized +$0.0M 0.2± 1 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.