Rosternomics
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December 13, 2017

SEACLE

SEA won this trade +$0.0M surplus SEA won this trade +0.1 WAR
SEASEA Jerry Dipoto net +$0.0M net +0.1
received −$3.2M−$3.2M ± $19M expected surplus · +$0.0M realized received 0.3 ± 2 expected · 0.1 realized WAR
Playoff odds: this deal moved SEA's 2018 odds 21% → 22% (+0.7 pts) — how trade timing is graded ↗
receives — most valuable first
Shawn ArmstrongP·27y·R/R
−$2.9M−$2.9M± $19M exp surplusrealized +$0.0M 0.3± 2 exp WARrealized 0.1
Prior
#548 overall draft pick — at the league baseline → 0.21/yr
Evidence
recent form -0.1/yr over 1.0 season
Talent
0.07/yr blended
Horizon
5.5 control yrs × 0.73 age decline
CLECLE Chris Antonetti net +$0.0M net -0.1
received +$0.0M+$0.0M ± $0M expected surplus · +$0.0M realized received 0.0 ± 0 expected · 0.0 realized WAR
Playoff odds: this deal moved CLE's 2018 odds 82% → 81% (-0.7 pts) — how trade timing is graded ↗
receives — most valuable first
cash / PTBNL
+$0.0M+$0.0M± $0M exp surplusrealized +$0.0M 0.0± 0 exp WARrealized 0.0
Cash or player to be named — no projection

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.