Complex sentence: In July 1947, Doby joined Jackie Robinson in breaking the MLB color barrier as he became the first black player to integrate the American League (AL) when he signed a contract to play with Bill Veeck's Cleveland Indians.
Split into simpler sentences: In July 1947, Doby joined Jackie Robinson in breaking the MLB color barrier. He became the first black player in the American League (AL) when he signed a contract to play with Bill Veeck's Cleveland Indians.