Rosternomics
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July 31, 2018

TBRPIT

TBR won this trade +$112.8M surplus TBR won this trade +17.6 WAR
TBRTBR Erik Neander net +$112.8M net +17.6
received +$40.8M+$40.8M ± $66M expected surplus · +$115.2M realized received 9.7 ± 8 expected · 19.0 realized WAR
Playoff odds: this deal moved TBR's 2018 odds 61% → 60% (-0.9 pts) — how trade timing is graded ↗
receives — most valuable first
Austin MeadowsDH/OF·23y·L/L
+$23.1M+$23.1M± $42M exp surplusrealized +$38.4M 4.4± 5 exp WARrealized 5.9
Prior
#9 overall draft pick → 0.80/yr
Evidence
no MLB track record — leans on pedigree
Talent
0.80/yr blended
Horizon
5.5 control yrs
Shane BazP·19y·R/R
+$14.0M+$14.0M± $42M exp surplusrealized +$14.4M 3.8± 5 exp WARrealized 3.3
Prior
#12 overall draft pick → 0.69/yr
Evidence
no MLB track record — leans on pedigree
Talent
0.69/yr blended
Horizon
5.5 control yrs
Tyler GlasnowP·24y·L/R
+$3.6M+$3.6M± $29M exp surplusrealized +$62.4M 1.5± 4 exp WARrealized 9.8
Prior
Composite #23.0 pedigree (Baseball America #23 (2017)) — fell off 1 list since, regressed → 0.43/yr
Evidence
recent form 0.1/yr over 0.8 season
Talent
0.28/yr blended
Horizon
5.5 control yrs
PITPIT Neal Huntington net −$112.8M net -17.6
received +$72.0M+$72.0M ± $26M expected surplus · +$2.4M realized received 5.3 ± 3 expected · 1.4 realized WAR
Playoff odds: this deal moved PIT's 2018 odds 14% → 14% (+0.4 pts) — how trade timing is graded ↗
receives — most valuable first
Chris ArcherP·29y·R/R
+$72.3M+$72.3M± $26M exp surplusrealized +$2.4M 5.3± 3 exp WARrealized 1.4
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 3.8/yr over 2.5 seasons
Talent
2.64/yr blended
Horizon
2.0 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.