About Cal Hubbard:
Robert Calvin Hubbard was a professional American football player and Major League Baseball (MLB) umpire. After playing football at Centenary College and Geneva College, Hubbard played in the National Football League (NFL) between 1927 and 1936 for the New York Giants, Green Bay Packers and Pittsburgh Pirates. He was an umpire in the American League (AL) from 1936 to 1951, then worked as an umpire supervisor until 1969.
The call that always seemed the toughest to me was the slide and tag play at second. You can see it coming, but you don't know which way the runner is going to slide, where the throw is going to be, and how the fielder is going to take the throw.Cal Hubbard