What is the oldest baseball rivalry?

What is the oldest baseball rivalry? The oldest MLB rivalry is the rivalry between the Los Angeles Dodgers and the San Francisco Giants, which began in the late 1880s when they faced off in the 1889 World Series. Both teams were originally from New York and later moved to the West Coast, though their rivalry persisted.

The oldest MLB rivalry is the rivalry between the Los Angeles Dodgers and the San Francisco Giants, which began in the late 1880s when they faced off in the 1889 World Series. Both teams were originally from New York and later moved to the West Coast, though their rivalry persisted.