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Legends Deck
Counterfactual engine · career receipts

What If

Baseball history's great what-ifs, re-simmed as full careers on the Legends Deck franchise engine: real rosters for every backdrop season, era-relative ratings, trades, injuries, aging and playoffs included. Every number on these pages comes from a committed simulation receipt: methodology and honest caveats ship with each one.

How it works: each run anchors the subject on his last real pre-divergence season, rebuilds the destination league from real Lahman rosters every year, and lets the franchise engine play it out: development, injuries, CPU trades, playoffs. Sim results are receipts, not promises: the engine's modern outcome-mix calibration and its home-run ceiling are flagged on every article.