O'Rourke began his career with the Worcester Ruby Legs of the National League and quickly established himself as one of the best players in the league. He was a key member of the team's championship run in 1880 and was named to the All-Star team in 1881. He was also a member of the Providence Grays in 1882 and the Boston Red Stockings in 1883.
Throughout his career, O'Rourke was known for his clutch hitting and his ability to come through in the clutch. He was also known for his leadership and his ability to motivate his teammates. He was a fan favorite wherever he played and was often referred to as "The King of Baseball".
O'Rourke retired from professional baseball in 1883 and went on to become a successful businessman. He was inducted into the Baseball Hall of Fame in 1945 and is remembered as one of the greatest players of his era.
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