Jack Farrell, often referred to by his nickname "Moose," was a professional baseball player whose career spanned the late 19th century. Born on June 29, 1857, in Newark, New Jersey, Farrell played primarily as a second baseman. His career in Major League Baseball began in the late 1870s, a time when the sport was still in its formative years and evolving rapidly.

Farrell's major league debut came with the Auburn team in the National Association in 1879. However, it was with the Providence Grays of the National League that he truly established himself. Joining the Grays in 1880, Farrell quickly became known for his defensive skills and his ability to handle the pressures of the infield. During his tenure with the Grays, he played alongside some of the era's most talented players, contributing to the team's competitive edge.

In 1881, Farrell moved to the Worcester Ruby Legs, where he continued to demonstrate his abilities as a reliable second baseman. His time with Worcester was marked by consistent performance, although the team itself struggled to find success in the league. Despite the challenges, Farrell's individual skills shone through, earning him respect among his peers and fans alike.

Farrell's career took another turn when he joined the Philadelphia Quakers in 1883. With the Quakers, he played for two seasons, further solidifying his reputation as a dependable player. His batting average during this period reflected his capability at the plate, complementing his defensive prowess. Farrell's presence in the lineup provided stability and experience, which were invaluable to the team.

In 1885, Farrell signed with the New York Metropolitans of the American Association. This move marked a new chapter in his career, as he adapted to the different style of play in the Association. Farrell's versatility in the infield was once again on display, and he continued to be a steady performer for the Metropolitans over the next few seasons.

Farrell's final years in professional baseball were spent with the Washington Nationals and the Indianapolis Hoosiers. Although his playing time began to diminish, he remained a respected figure in the sport. His career statistics, including a lifetime batting average of .243 and numerous fielding achievements, reflect his steady presence on the field.

Throughout his career, Jack Farrell was known for his work ethic and his ability to adapt to the changing dynamics of the game.