ABC confirmed the news in a statement, saying Uncle Frank was "beloved by his co-workers and considered an uncle to all. His kindness and humor will be missed by everyone he touched."
Potenza was a New York City cop for 20 years before becoming a security guard in Las Vegas (and personal security guard to Frank Sinatra) and Manhattan. He moved to Los Angeles when his nephew hired him for a new gig as security guard/commentator on 'Jimmy Kimmel Live!.'
According to Potenza's bio on ABC's site, he only arrested six people during his two decades as a cop. He enjoyed "cake and ice cream, walking, and spending time with his family," and was married to Kimmel's Aunt Chippy for 28 years -- he even bought a burial plot next to her after their divorce.
Since 'Jimmy Kimmel Live!' is on hiatus until September, there is no immediate plan for an on-air tribute, the AP reports.
Tell us: Will you miss Uncle Frank?