Complex sentence: He was one of the most prodigious National League sluggers in the late 1920s and early 1930s, and was the first major league player to be named to the All-Star Game as a member of two different teams.
Split into simpler sentences: He was one of the most prodigious National League sluggers in the late 1920s and early 1930s. He became the first baseball player to be named to the All-Star Game as a member of two different teams.