The Marlins, with a 6-3 victory over the Expos at Montreal’s Olympic Stadium, clinch their first-ever postseason berth. Florida, which reaches the playoffs in just their fifth year in existence, will become the youngest franchise to ever win a World Championship.

On September 23, 1997 — The Marlins, with a 6-3 victory over the Expos at Montreal’s Olympic Stadium, clinch their first-ever postseason berth. Florida, which reaches the playoffs in just their fifth year in existence, will become the youngest franchise to ever win a World Championship.