A player, manager, umpire and scout for more than 40 years in the National League, Hank O’Day remains the only person to serve the league in so many capacities.

But it was as an umpire where O’Day made his greatest mark on history in some of baseball’s greatest games. And it’s as an umpire that O’Day earned election to the National Baseball Hall of Fame, just the 10th arbiter to be inducted.

On the gridiron, Cal Hubbard pioneered the modern linebacker position and was one of the most intimidating players in the National Football League.

But it was his remarkable ability to arbitrate the action on the baseball diamond that propelled Hubbard to become the only man in both the Pro Football and Baseball Halls of Fame.

“I’m just a big old country boy who hated to sit on the sidelines,” Hubbard said. “I wanted to be in the middle of the action.”