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In Memoriam: Mark Darby, former US Open assistant referee

Arthur Kapetanakis | February 04, 2025

Mark Darby, a longtime official and one of the most personable and popular figures in professional tennis, passed away Friday at his Florida home at the age of 68.

 

A native of Rochester, Pa., Darby began his officiating career as a USTA supervisor and US Open assistant referee in the mid-1980s before working as an ATP Tour supervisor from 1990 through 2017. He served an additional year as US Open assistant referee in 2018.

 

Unflappable under pressure, Darby built a sterling reputation among officials and players alike for his attention to detail and his outgoing, friendly nature. He was one of tennis’ greatest and most well-liked ambassadors, his personable approach and ever-present smile winning him friends and fans all around the globe.

"Our sport has lost an incredible champion," said US Open tournament director Stacey Allaster. "Throughout his career Mark served as a trusted friend to the USTA, whether it was supporting the US Open Series or the Western & Southern Open, or serving as assistant referee at the US Open.

 

"His kindness, dedication and passion for our athletes and the game will be remembered by all who had the privilege to work with him."

 

A USTA Middle States Hall of Famer, Darby enjoyed a high-level playing career before transitioning into his work as an official. A Pennsylvania state champion in high school, he played college tennis for Penn State and qualified for the 1978 NCAA Championships. After posting one of the best overall singles records in school history, Darby went on to reach the Top 500 in the ATP rankings in both singles and doubles.

Mark Darby at the 2018 US Open.

Darby grew up near former US Open tournament referee Brian Earley, with the pair taking tennis lessons from the same pro in Pennsylvania. Their paths continued to cross as officials at the game's highest level.

 

"Mark was a friend as much as a colleague," said Earley, who recalled many lengthy conversations about rules and rule interpretations. "He was incredibly detail-oriented as a supervisor. Unflappable is the word that comes to mind—that's pretty important for a referee."

 

Always approachable, Darby served as a mentor to many players and officials, including current US Open referee Jake Garner.

 

"Mark was always there to talk, offering a calm presence and helpful feedback, especially when I was a new chair umpire," said Garner. "His guidance and mentorship have been invaluable throughout my career."

 

With an influence that extends far beyond the court, Darby has left an indelible mark on the tennis community. His legacy will also live on through his children, triplets Caroline, Connor and Ryan.

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