Rosternomics
← Trade Database
November 20, 2017

TEXNYY

TEX won this trade +$0.0M surplus TEX won this trade +0 WAR
TEXTEX Jon Daniels net +$0.0M net +0.0
received −$0.8M−$0.8M ± $26M expected surplus · +$0.0M realized received 0.7 ± 3 expected · 0.0 realized WAR
receives — most valuable first
Ronald HerreraP·23y·R/R
−$0.8M−$0.8M± $26M exp surplusrealized +$0.0M 0.7± 3 exp WARrealized 0.0
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form -1.5/yr over 0.1 season
Talent
0.12/yr blended
Horizon
5.5 control yrs
NYYNYY Brian Cashman net +$0.0M net +0.0
received +$1.6M+$1.6M ± $21M expected surplus · +$0.0M realized received 1.2 ± 3 expected · 0.0 realized WAR
receives — most valuable first
Reiver SanmartinP·22y·L/L
+$1.8M+$1.8M± $21M exp surplusrealized +$0.0M 1.2± 3 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

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.