Rosternomics
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July 31, 2015

MINTBR

TBR won this trade +$0.8M surplus MIN won this trade +0.4 WAR
MINMIN Terry Ryan net −$0.8M net +0.4
received +$2.4M+$2.4M ± $9M expected surplus · −$0.8M realized received 0.8 ± 1 expected · 0.4 realized WAR
Playoff odds: this deal moved MIN's 2015 odds 4% → 4% (+0.7 pts) — how trade timing is graded ↗
receives — most valuable first
Kevin JepsenP·30y·R/R
+$2.7M+$2.7M± $9M exp surplusrealized −$0.8M 0.8± 1 exp WARrealized 0.4
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 0.6/yr over 2.5 seasons
Talent
0.48/yr blended
Horizon
2.0 control yrs × 0.86 age decline
TBRTBR Matt Silverman net +$0.8M net -0.4
received +$2.4M+$2.4M ± $20M expected surplus · +$0.0M realized received 1.4 ± 2 expected · 0.0 realized WAR
Playoff odds: this deal moved TBR's 2015 odds 19% → 16% (-2.6 pts) — how trade timing is graded ↗
receives — most valuable first
Chih-Wei HuP·21y·R/R
+$1.8M+$1.8M± $19M exp surplusrealized +$0.0M 1.2± 2 exp WARrealized 0.0
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
Alexis Tapia
+$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.