Rosternomics
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July 28, 2015

ANACLE

CLE won this trade +$0.8M surplus ANA won this trade +0.4 WAR
ANAANA Bill Stoneman net −$0.8M net +0.4
received +$0.8M+$0.8M ± $6M expected surplus · −$4.0M realized received 0.6 ± 1 expected · -0.2 realized WAR
Playoff odds: this deal moved ANA's 2015 odds 6% → 6% (-0.3 pts) — how trade timing is graded ↗
receives — most valuable first
David MurphyOF·33y·L/L
+$0.8M+$0.8M± $6M exp surplusrealized −$4.0M 0.6± 1 exp WARrealized -0.2
Prior
league baseline (track record outweighs draft pedigree) → 0.25/yr
Evidence
recent form 0.8/yr over 2.4 seasons
Talent
0.59/yr blended
Horizon
1.0 control yr
CLECLE Mark Shapiro net +$0.8M net -0.4
received +$1.6M+$1.6M ± $19M expected surplus · −$3.2M realized received 1.2 ± 2 expected · -0.6 realized WAR
Playoff odds: this deal moved CLE's 2015 odds 41% → 42% (+1.2 pts) — how trade timing is graded ↗
receives — most valuable first
Eric StametsSS·23y·R/R
+$1.8M+$1.8M± $19M exp surplusrealized −$3.2M 1.2± 2 exp WARrealized -0.6
Prior
#207 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

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.