What was the date of Babe Ruth's first MLB home run?

Babe Ruth hit his first MLB home run on May 6, 1915. He was playing for the Boston Red Sox and hit the home run off New York Yankees pitcher Jack Warhop at the Polo Grounds in New York City.

Ruth was still primarily a pitcher at this point in his career. He had debuted with Boston in 1914 and was developing a reputation as an unusually capable hitter, but home runs were still relatively uncommon in the Deadball Era. In 1915, he batted .315 and hit four home runs while also winning 18 games as a pitcher.

The date is sometimes confused with Ruth’s first home run as a Yankee, which came later, after Boston sold his contract to New York following the 1919 season. It is also distinct from his first professional home runs in the minor leagues. May 6, 1915, refers specifically to his first home run in Major League Baseball.