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Simulated careers · real rosters
What If
Change one thing about baseball history, then play out the whole career. We drop a legend onto a different team, keep every other roster exactly as it really was, and let the Legends Deck franchise engine play every game: aging, injuries, trades and playoffs included.
Fantasy · across eras
What if Babe Ruth joined the 2004 Yankees?
The winter the Yankees traded for Alex Rodriguez, we gave them a 25-year-old Babe Ruth too. Twelve simulated seasons later, here's what he did against modern pitching.
2004–2015 · 642 HR · .290 AVG
Real history, one change
What if Babe Ruth played for the St. Louis Cardinals?
In December 1919 the Red Sox sold Babe Ruth to the Yankees and changed baseball forever. We sent him to St. Louis instead, and played out all fifteen seasons.
1920–1934 · 731 HR · .348 AVG
Real history, one change
What if the Red Sox had pulled off the A-Rod trade?
In December 2003 the Red Sox agreed to trade for Alex Rodriguez, and a union office killed the deal. We replayed his entire New York career in a Boston uniform.
2004–2016 · 296 HR · .252 AVG
Real history, one change
What if the Red Sox had kept Mookie Betts?
On February 9, 2020, the Red Sox traded Mookie Betts a year before free agency. We replayed every season he has played for the Dodgers since in a Boston uniform.
2020–2025 · 138 HR · .264 AVG
Real history, one change
What if Barry Bonds had never left the Pirates?
After the 1992 season Barry Bonds left Pittsburgh as a free agent, and the Pirates did not have a winning season for two decades. We replayed his entire San Francisco career in a Pirates uniform.
1993–2007 · 528 HR · .294 AVG
How it works: each story follows the player's real seasons and real playing time. Every other team uses its real roster for each year, every season runs on that era's real schedule and postseason format, and every game is simulated. Each article explains where the simulation differs from history, including the engine's modern run scale.