On December 15, 1900, the New York Giants and Cincinnati Reds swap future Hall of Famers. The Giants reacquire 20-year-old Christy Mathewson from the Reds for 29-year-old Amos Rusie. As a rookie, Mathewson went 0-3 in six appearances for the Giants, but will win 373 games over the next 16 seasons…