Rosternomics
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March 24, 2019

MILSFG

MIL won this trade +$0.8M surplus MIL won this trade +0.2 WAR
MILMIL David Stearns net +$0.8M net +0.2
received +$2.4M+$2.4M ± $22M expected surplus · +$0.0M realized received 1.3 ± 3 expected · 0.0 realized WAR
Playoff odds: this deal moved MIL's 2019 odds 20% → 20% (+0.6 pts) — how trade timing is graded ↗
receives — most valuable first
C.J. Hinojosa2B·24y·R/R
+$2.3M+$2.3M± $22M exp surplusrealized +$0.0M 1.3± 3 exp WARrealized 0.0
Prior
#336 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
SFGSFG Farhan Zaidi net −$0.8M net -0.2
received +$0.0M+$0.0M ± $0M expected surplus · −$0.8M realized received 0.0 ± 0 expected · -0.2 realized WAR
Playoff odds: this deal moved SFG's 2019 odds 0% → 0% (-0 pts) — how trade timing is graded ↗
receives — most valuable first
Erik KratzC·39y·R/R
−$0.1M−$0.1M± $0M exp surplusrealized −$0.8M 0.0± 0 exp WARrealized -0.2
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 1.3/yr over 0.8 season
Talent
0.65/yr blended
Horizon
0.0 control yr

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.