The following are the baseball events of the year 1890 throughout the world.

The Brooklyn Dodgers were a Major League Baseball team founded in 1883 as the Brooklyn Grays, next year in 1884 becoming a member of the American Association as the Brooklyn Atlantics before joining the National League in 1890. They remained in Brooklyn until 1957, after which the club moved to Los Angeles, California, where it continues its history as the Los Angeles Dodgers. The team moved west at the same time as its longtime rival, the New York Giants, moved to San Francisco in northern California as the San Francisco Giants.