Vance, Steve. "The Fighters"
Divergence: 1919 CE
What if: Boxer Jack Dempsey had to fight more matches.
Summary: Time traveler from 2030 seeking entertainment programming manipulate Dempsey's career. But if they're so willing to alter history for money, why aren't they willing to do so out of altruism.
Published: In Paradox #3 (Autumn 2003).