Mike Muldoon was a professional baseball player who had a successful career in the late 19th century. He was a pitcher and outfielder for the Chicago White Stockings, the predecessor of the Chicago Cubs. Muldoon was known for his powerful arm and his ability to hit the ball hard. He was also known for his aggressive style of play, which often led to arguments with umpires and opposing players.

Muldoon was a key member of the White Stockings team that won the National League pennant in 1885. He was the team's leading pitcher that season, with a record of 25-14 and an ERA of 2.45. He also led the team in strikeouts with 166. Muldoon was also a solid hitter, batting .269 with four home runs and 41 RBIs.

Muldoon's career was cut short due to a shoulder injury. He attempted to make a comeback in 1886, but the injury was too severe and he was forced to retire. Despite his short career, Muldoon left an indelible mark on the game of baseball. He was one of the first pitchers to use a curveball, and his aggressive style of play helped to shape the modern game.

Muldoon's legacy lives on in the form of the Mike Muldoon Award, which is given annually to the best pitcher in the National League. He is also remembered for his contributions to the game of baseball, and his career is an inspiration to all aspiring players.