Rosternomics
← Trade Database
July 30, 2021

MINSTL

MIN won this trade +$1.6M surplus MIN won this trade +0.0 WAR
MINMIN Derek Falvey net +$1.6M net +0.0
received +$8.8M+$8.8M ± $26M expected surplus · +$2.4M realized received 2.3 ± 3 expected · 0.4 realized WAR
receives — most valuable first
John GantP·28y·R/R
+$6.7M+$6.7M± $16M exp surplusrealized +$2.4M 1.1± 2 exp WARrealized 0.4
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 0.8/yr over 1.8 season
Talent
0.56/yr blended
Horizon
2.0 control yrs
Evan SiskP·24y·L/L
+$1.8M+$1.8M± $20M exp surplusrealized +$0.0M 1.2± 2 exp WARrealized 0.0
Prior
#483 overall draft pick — at the league baseline → 0.21/yr
Evidence
no MLB track record — leans on pedigree
Talent
0.21/yr blended
Horizon
5.5 control yrs
STLSTL John Mozeliak net −$1.6M net +0.0
received −$2.4M−$2.4M ± $0M expected surplus · +$0.8M realized received 0.0 ± 0 expected · 0.4 realized WAR
receives — most valuable first
J. A. HappP·38y·L/L
−$2.2M−$2.2M± $0M exp surplusrealized +$0.8M 0.0± 0 exp WARrealized 0.4
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 2.2/yr over 2.1 seasons
Talent
1.46/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.