Rosternomics
← Trade Database
August 4, 1989

CHWANA

CHW won this trade +$9.6M surplus CHW won this trade +9.1 WAR
CHWCHW Larry Himes net +$9.6M net +9.1
received +$12.8M+$12.8M ± $39M expected surplus · +$8.0M realized received 3.6 ± 5 expected · 9.0 realized WAR
receives — most valuable first
Roberto HernándezP·24y·R/R
+$12.2M+$12.2M± $38M exp surplusrealized +$8.0M 3.4± 5 exp WARrealized 9.0
Prior
#16 overall draft pick → 0.61/yr
Evidence
no MLB track record — leans on pedigree
Talent
0.61/yr blended
Horizon
5.5 control yrs
Mark Doran
+$0.3M+$0.3M± $12M exp surplusrealized +$0.0M 0.2± 2 exp WARrealized 0.0
Unidentified minor-league throw-in — valued at the ~0.2 WAR base rate (most produce nothing)
ANAANA Mike Port net −$9.6M net -9.1
received +$1.6M+$1.6M ± $30M expected surplus · −$1.6M realized received 1.2 ± 4 expected · -0.1 realized WAR
receives — most valuable first
Mark DavisOF·24y·R/R
+$1.8M+$1.8M± $30M exp surplusrealized −$1.6M 1.2± 4 exp WARrealized -0.1
Prior
#232 overall draft pick — at the league baseline → 0.21/yr
Evidence
no MLB track record — leans on pedigree
Talent
0.21/yr blended
Horizon
5.5 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.