Rosternomics
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February 17, 2021

MIATBR

MIA won this trade +$2.4M surplus MIA won this trade +0.5 WAR
MIAMIA Kim Ng net +$2.4M net +0.5
received +$2.4M+$2.4M ± $22M expected surplus · +$2.4M realized received 1.2 ± 3 expected · 0.5 realized WAR
Playoff odds: this deal moved MIA's 2021 odds 2% → 2% (+0.2 pts) — how trade timing is graded ↗
receives — most valuable first
John CurtissP·28y·R/R
+$2.7M+$2.7M± $22M exp surplusrealized +$2.4M 1.2± 3 exp WARrealized 0.5
Prior
#170 overall draft pick — at the league baseline → 0.21/yr
Evidence
recent form 0.5/yr over 0.8 season
Talent
0.33/yr blended
Horizon
5.0 control yrs × 0.74 age decline
TBRTBR Erik Neander net −$2.4M net -0.5
received +$2.4M+$2.4M ± $22M expected surplus · +$0.0M realized received 1.3 ± 3 expected · 0.0 realized WAR
Playoff odds: this deal moved TBR's 2021 odds 87% → 86% (-1.4 pts) — how trade timing is graded ↗
receives — most valuable first
Evan Edwards1B·24y·L/L
+$2.3M+$2.3M± $22M exp surplusrealized +$0.0M 1.3± 3 exp WARrealized 0.0
Prior
#111 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.