Rosternomics
← Trade Database
July 30, 2024

WSNARI

unsettledToo soon to call — players still accruing.
WSNWSN Michael Rizzo net +$4.0M net +0.8
received +$1.6M+$1.6M ± $21M expected surplus · +$0.8M realized received 1.2 ± 3 expected · 0.4 realized WAR
Playoff odds: this deal moved WSN's 2024 odds 3% → 3% (+0.3 pts) — how trade timing is graded ↗
receives — most valuable first
Andrés Chaparro1B/DH·25y·R/R
+$1.8M+$1.8M± $21M exp surplusrealized +$0.8M 1.2± 3 exp WARrealized 0.4
Prior
no pedigree — league baseline → 0.21/yr
Evidence
no MLB track record — leans on pedigree
Talent
0.21/yr blended
Horizon
5.5 control yrs
ARIARI Mike Hazen net −$4.0M net -0.8
received +$4.8M+$4.0M ± $14M expected surplus · −$3.2M realized received 1.1 ± 2 expected · -0.4 realized WAR
Playoff odds: this deal moved ARI's 2024 odds 79% → 77% (-1.9 pts) — how trade timing is graded ↗
receives — most valuable first
Dylan FloroP·33y·L/R
+$4.4M+$3.6M± $14M exp surplusrealized −$3.2M 1.1± 2 exp WARrealized -0.4
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 1.0/yr over 2.6 seasons
Talent
0.77/yr blended
Horizon
1.5 control yr × 0.92 age decline
Fan verdict — who overpaid?

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.