RRosternomics
← Trade Database
August 3, 2026

SFGPHI

unsettledToo soon to call — players still accruing.
SFGSFG Buster Posey net +$0.0M net +0.0
received +$3.2M+$3.2M ± $79M expected surplus · +$0.0M realized received 2.2 ± 10 expected · 0.0 realized WAR
Playoff odds: this deal moved SFG's 2026 odds 0.0% → 0.0% (+0 pts) — how trade timing is graded ↗
receives — most valuable first
Marty GairP·22y·R/R
+$1.8M+$1.8M± $56M exp surplusrealized +$0.0M 1.1± 7 exp WARrealized 0.0
Prior
#403 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 × 0.88 age decline
Ramon MarquezP·20y·R/R
+$1.8M+$1.8M± $56M exp surplusrealized +$0.0M 1.1± 7 exp WARrealized 0.0
Prior
no pedigree — league baseline → 0.21/yr
Evidence
no MLB track record — leans on pedigree
Talent
0.21/yr blended
Horizon
6.0 control yrs × 0.88 age decline
PHIPHI Dave Dombrowski net +$0.0M net +0.0
received −$0.8M−$0.8M ± $18M expected surplus · +$0.0M realized received 1.1 ± 2 expected · 0.0 realized WAR
Playoff odds: this deal moved PHI's 2026 odds 74.3% → 75.6% (+1.3 pts) — how trade timing is graded ↗
receives — most valuable first
Luis Arráez1B/2B·29y·L/R
+$0.6M+$0.6M± $6M exp surplusrealized +$0.0M 0.7± 1 exp WARrealized 0.0
Prior
no pedigree — league baseline → 0.21/yr
Evidence
recent form 1.7/yr over 2.5 seasons
Talent
1.97/yr blended
Horizon
1.0 control yr × 0.31 age decline
Caleb KilianP·29y·R/R
−$1.3M−$1.3M± $18M exp surplusrealized +$0.0M 0.4± 2 exp WARrealized 0.0
Prior
#236 overall draft pick — at the league baseline → 0.21/yr
Evidence
recent form -0.2/yr over 0.2 season
Talent
0.33/yr blended
Horizon
5.0 control yrs × 0.28 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 (Baseball America rank / draft slot, or a baseline) with his recent track record, projected over the years of team control acquired. The ± band is the uncertainty — wide for unproven prospects, tight for established veterans. 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.

Historically these expected values are unbiased and land within ±2 WAR of reality 75% of the time — yet the side the model favors actually comes out ahead only 53% of the time. The grade is a calibrated bet, not a prediction. Why trades are an efficient market →