Rosternomics
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October 31, 2008

MIAKCR

MIA won this trade +$9.6M surplus MIA won this trade +1.7 WAR
MIAMIA Larry Beinfest net +$9.6M net +1.7
received +$2.4M+$2.4M ± $13M expected surplus · −$1.6M realized received 0.7 ± 2 expected · 0.8 realized WAR
Playoff odds: this deal moved MIA's 2009 odds 14% → 14% (+0.3 pts) — how trade timing is graded ↗
receives — most valuable first
Juan Carlos OviedoP·27y·R/R
+$2.1M+$2.1M± $13M exp surplusrealized −$1.6M 0.7± 2 exp WARrealized 0.8
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 0.5/yr over 1.7 season
Talent
0.37/yr blended
Horizon
2.0 control yrs
KCRKCR Dayton Moore net −$9.6M net -1.7
received −$2.4M−$2.4M ± $18M expected surplus · −$11.2M realized received 0.0 ± 2 expected · -0.9 realized WAR
Playoff odds: this deal moved KCR's 2009 odds 0% → 0% (-0 pts) — how trade timing is graded ↗
receives — most valuable first
Mike Jacobs1B·28y·L/R
−$2.2M−$2.2M± $18M exp surplusrealized −$11.2M 0.0± 2 exp WARrealized -0.9
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form -0.5/yr over 1.9 season
Talent
-0.23/yr blended
Horizon
3.0 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.