Rosternomics
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November 25, 2013

OAKWSN

WSN won this trade +$1.6M surplus OAK won this trade +0.1 WAR
OAKOAK Billy Beane net −$1.6M net +0.1
received −$0.8M−$0.8M ± $13M expected surplus · −$1.6M realized received 0.4 ± 2 expected · 0.1 realized WAR
Playoff odds: this deal moved OAK's 2014 odds 33% → 37% (+3.4 pts) — how trade timing is graded ↗
receives — most valuable first
Fernando AbadP·28y·L/L
−$0.9M−$0.9M± $13M exp surplusrealized −$1.6M 0.4± 2 exp WARrealized 0.1
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 0.1/yr over 2.3 seasons
Talent
0.14/yr blended
Horizon
4.0 control yrs × 0.76 age decline
WSNWSN Michael Rizzo net +$1.6M net -0.1
received +$2.4M+$2.4M ± $21M expected surplus · +$0.0M realized received 1.3 ± 3 expected · 0.0 realized WAR
Playoff odds: this deal moved WSN's 2014 odds 90% → 89% (-1.4 pts) — how trade timing is graded ↗
receives — most valuable first
John WootenRF·23y·R/R
+$2.3M+$2.3M± $21M exp surplusrealized +$0.0M 1.3± 3 exp WARrealized 0.0
Prior
#594 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

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.