Cornelius McGillicuddy, better known as Connie Mack, was an American professional baseball catcher, manager, and team owner. The longest-serving manager in Major League Baseball history, he holds records for wins (3,731), losses (3,948), and games managed (7,755). Mack's victory total is 829 more than the second highest total, 2,902 wins by Tony La Russa. Mack's lead in career losses is even greater, 1,433 higher than the second highest total, La Russa's 2,515.

Henry James Killilea was an American baseball team owner and attorney. He was one of the founders of baseball's American League. He also played college football and baseball at the University of Michigan.