Rosternomics
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January 14, 1998

HOUSDP

HOU won this trade +$8.8M surplus HOU won this trade +2.9 WAR
HOUHOU Gerry Hunsicker net +$8.8M net +2.9
received +$6.4M+$6.4M ± $25M expected surplus · +$3.2M realized received 1.8 ± 3 expected · 2.2 realized WAR
Playoff odds: this deal moved HOU's 1998 odds 92% → 94% (+2.7 pts) — how trade timing is graded ↗
receives — most valuable first
Sean BergmanP·28y·R/R
+$6.5M+$6.5M± $25M exp surplusrealized +$3.2M 1.8± 3 exp WARrealized 2.2
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form 0.8/yr over 2.1 seasons
Talent
0.60/yr blended
Horizon
3.0 control yrs
SDPSDP Kevin Towers net −$8.8M net -2.9
received −$1.6M−$1.6M ± $10M expected surplus · −$5.6M realized received 0.0 ± 1 expected · -0.7 realized WAR
Playoff odds: this deal moved SDP's 1998 odds 43% → 33% (-9.9 pts) — how trade timing is graded ↗
receives — most valuable first
James MoutonOF·29y·R/R
−$1.5M−$1.5M± $10M exp surplusrealized −$5.6M 0.0± 1 exp WARrealized -0.7
Prior
league baseline (track record outweighs draft pedigree) → 0.21/yr
Evidence
recent form -0.1/yr over 1.6 season
Talent
0.02/yr blended
Horizon
2.0 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.