Four years after the Arizona Diamondbacks took the field as an expansion team, the veteran-led roster pulled off the impossible and toppled the three-time defending champion New York Yankees in a walk-off, Game 7 World Series victory. For the 25th anniversary of their historic title, MLB Network traces the D-backs' trajectory from their inception through one of the most dramatic Fall Classics ever played in the 50th installment of the "MLB Network Presents" series.