Rosternomics
Log in Sign up 𝕏
← Trade Database
July 31, 2025

LAD⇄BOS

unsettledToo soon to call — players still accruing.
LADLAD Andrew Friedman net +$1.6M net +0.1
received +$14.4M+$14.4M ± $34M expected surplus · +$0.0M realized received 5.3 ± 4 expected · 0.0 realized WAR
Playoff odds: this deal moved LAD's 2025 odds 86% → 86% (+0.2 pts) — how trade timing is graded ↗
receives — most valuable first
James Tibbs IIIRF·22y·L/L
+$12.2M+$12.2M± $26M exp surplusrealized +$0.0M 4.0± 3 exp WARrealized 0.0
Prior
#13 overall draft pick → 0.67/yr
Evidence
no MLB track record — leans on pedigree
Talent
0.67/yr blended
Horizon
6.0 control yrs
Zach EhrhardOF·22y·R/R
+$2.3M+$2.3M± $22M exp surplusrealized +$0.0M 1.3± 3 exp WARrealized 0.0
Prior
#115 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
BOSBOS Craig Breslow net −$1.6M net -0.1
received +$4.8M+$4.8M ± $10M expected surplus · −$1.6M realized received 0.9 ± 1 expected · -0.1 realized WAR
Playoff odds: this deal moved BOS's 2025 odds 67% → 67% (-0.4 pts) — how trade timing is graded ↗
receives — most valuable first
Dustin MayP·27y·R/R
+$5.1M+$5.1M± $10M exp surplusrealized −$1.6M 0.9± 1 exp WARrealized -0.1
Prior
#101 overall draft pick — at the league baseline → 0.21/yr
Evidence
recent form 2.8/yr over 0.5 season
Talent
0.92/yr blended
Horizon
1.0 control yr
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.

Rosternomics — front-office performance, roster value, and transaction history. Follow @rosternomics on X.
Decision-maker records extend to 1933; resource-controlled WAR and payroll metrics cover 1985–2026. Data sources include FanGraphs, Baseball-Reference, the Chadwick Bureau register, the Lahman Database, prospect rankings from Baseball America, MLB Pipeline, and FanGraphs, and public payroll records. Transaction and trade data was obtained free of charge from and is copyrighted by Retrosheet. Executive birth/death data via Wikidata (CC0).
Privacy Policy · Terms of Service · © 2026 Rosternomics