Rosternomics
← Trade Database
July 31, 1998

SEAHOU

SEA won this trade +$171.2M surplus SEA won this trade +28.4 WAR
SEASEA Woody Woodward net +$171.2M net +28.4
received +$8.0M+$8.0M ± $41M expected surplus · +$196.0M realized received 4.5 ± 5 expected · 31.5 realized WAR
Playoff odds: this deal moved SEA's 1998 odds 67% → 52% (-14.5 pts) — how trade timing is graded ↗
receives — most valuable first
Carlos GuillénSS·22y·B/R
+$5.1M+$5.1M± $24M exp surplusrealized +$20.0M 2.2± 3 exp WARrealized 7.2
Prior
Composite #27.0 prospect (Baseball America #27 (1997)) — fell off 1 list since, regressed → 0.41/yr
Evidence
no MLB track record — leans on pedigree
Talent
0.41/yr blended
Horizon
5.5 control yrs
Freddy GarcíaP·21y·R/R
+$1.8M+$1.8M± $24M exp surplusrealized +$136.0M 1.2± 3 exp WARrealized 18.2
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
John HalamaP·26y·L/L
+$1.3M+$1.3M± $22M exp surplusrealized +$40.0M 1.1± 3 exp WARrealized 6.1
Prior
#640 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 × 0.94 age decline
HOUHOU Gerry Hunsicker net −$171.2M net -28.4
received +$90.4M+$56.8M ± $22M expected surplus · +$24.8M realized received 6.5 ± 3 expected · 3.1 realized WAR
Playoff odds: this deal moved HOU's 1998 odds 90% → 94% (+4.2 pts) — how trade timing is graded ↗
receives — most valuable first
Randy JohnsonP·34y·R/L
+$90.2M+$57.0M± $22M exp surplusrealized +$24.8M 6.5± 3 exp WARrealized 3.1
Prior
league baseline (track record outweighs draft pedigree) → 0.23/yr
Evidence
recent form 6.5/yr over 2.4 seasons
Talent
4.40/yr blended
Horizon
1.5 control yr × 0.98 age decline

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.