Bill Klem Hall of Fame MLB

Bill Klem is widely considered the father of modern umpiring. Serving as a National League umpire from 1905 to 1941, Klem brought professionalism, authority, and innovation to the role. He was the first to use hand signals for balls and strikes, setting a new standard in communication and consistency.

Known for his booming voice, fierce command of the game, and commitment to integrity, Klem umpired 18 World Series—more than any other umpire in history. His 5,375 career games umpired remains one of the highest totals ever. Klem demanded respect on the field and viewed umpiring as a sacred responsibility, famously stating, “It ain't nothing till I call it.”

He fiercely defended the dignity of the profession and was instrumental in elevating the public perception of umpires. His legacy lives on through every official who follows in his footsteps. Klem was elected to the Hall of Fame in 1953, becoming the first umpire ever inducted.

Klem's Awards and Records

• First umpire inducted into the National Baseball Hall of Fame (1953)
• Most World Series umpired in MLB history (18)
• One of the longest careers by any MLB umpire (37 seasons)
• Introduced hand signals to umpiring
• Nicknamed “The Old Arbitrator” for his authoritative style
• Umpired MLB’s first All-Star Game in 1933
• Member of the MLB All-Century Team (umpire category)

Years active: 

National League (1905–1941)