The following are the baseball events of the year 1884 throughout the world.

Timothy John Keefe, nicknamed "Smiling Tim" and "Sir Timothy", was an American Major League Baseball pitcher. He stood 5 feet 10 inches (1.78 m) tall and weighed 185 pounds (84 kg). He was one of the most dominating pitchers of the 19th century and posted impressive statistics in one category or another for almost every season he pitched. He was the second MLB pitcher to record 300 wins. He was elected to the Baseball Hall of Fame in 1964.