Rosternomics
← Trade Database
September 27, 2011

KCROAK

KCR won this trade +$1.6M surplus KCR won this trade +0.1 WAR
KCRKCR Dayton Moore net +$1.6M net +0.1
received +$2.4M+$2.4M ± $24M expected surplus · +$0.0M realized received 1.3 ± 3 expected · 0.0 realized WAR
receives — most valuable first
Ethan HollingsworthP·24y·R/R
+$2.3M+$2.3M± $24M exp surplusrealized +$0.0M 1.3± 3 exp WARrealized 0.0
Prior
#137 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
OAKOAK Billy Beane net −$1.6M net -0.1
received +$1.6M+$1.6M ± $17M expected surplus · −$1.6M realized received 1.2 ± 2 expected · -0.1 realized WAR
receives — most valuable first
Kila Ka'aihue1B/DH·27y·L/R
+$1.7M+$1.7M± $17M exp surplusrealized −$1.6M 1.2± 2 exp WARrealized -0.1
Prior
#438 overall draft pick — at the league baseline → 0.21/yr
Evidence
recent form 0.4/yr over 0.4 season
Talent
0.25/yr blended
Horizon
5.0 control yrs × 0.92 age decline

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.