Mark Stanley O'Mahoney

With profound sadness, we announce the passing of Mark O’Mahoney—beloved husband, devoted father, cherished friend, and truly one-of-a-kind human being—who left this world peacefully on June 21, 2025, at the age of 76. Mark was a proud and loving husband to Elizabeth O’Mahoney, his rock and soulmate of over 50 years. She kept him grounded—especially when his honesty walked the line—always steering him in the right direction with grace. Together, they raised three sons—Brandon, Ryan, and Sean—who carry forward their father's character, and unmistakable sense of self. As a dad, Mark had a way of making his sons feel like champions— especially during a game of pool. Every so often, one of them would manage a win, never quite realizing it was his quiet influence that made it possible. That was Mark: always building you up, coaching you, and pointing you in the right direction without you even knowing it. Mark was also a joyful and energetic grandfather to his nine grandchildren—Thomas, Valor, Atlas, Merit, Connor, Enzo, Elizabeth, Maggie, and Mark Patrick. He loved nothing more than chasing them around the house, playing games, making them laugh, and finding endless ways to keep them entertained. To them, he wasn’t just Pop—he was the fun one, the one who never ran out of energy or hugs. Born in Pittsburgh, Pennsylvania on October 6, 1948, Mark was the eighth of ten O’Mahoney siblings: Paul, Maureen, Joan, Dickey, Nancy, Timmy, Terry, Mark, Lynn, and Phillip. From the start, he stood out. Mark lived boldly from a young age—so much so that his mother famously said he’d be “dead or in jail by 25.” Instead, he carved out a fearless, full life that defied expectations and left a lasting mark on everyone who knew him. His friends often described him as “1 of 1”—a rare and unforgettable soul whose authenticity set him apart in every room he entered. Mark lived a remarkable life filled with heart, and bold honesty. He never wavered from telling the truth, no matter the setting—a trait that earned him deep respect and lasting friendships. “He was so dang genuine,” one friend recently shared. It was this unapologetic honesty, paired with his undeniable charm, that made Mark unforgettable. Among his many life accomplishments, Mark was featured in Sports Illustrated, the Guinness Book of World Records, and even has his name proudly displayed in the Heinz History Center in his hometown ofPittsburgh—a testament to a life lived with passion and impact. Mark had a deep love for music, especially when he had a guitar in hand. Whether on a small stage, at afamily gathering, or in the living room, he never missed a chance to share his talents. He brought joy through music, storytelling, and a presence that made people feel seen and heard. He didn’t chase attention, but it always seemed to find him. That’s what happens when someone is whollyand unapologetically themselves. His legacy isn’t just in the records he broke or the honors he received—it’s in the memories he left behind and the lives he touched just by being Mark. A private family service will be held in his honor. In lieu of flowers, the family asks that you take a moment to call your dad, hug your kids, lend a hand to someone who needs it, or do something genuine and bold—just like Mark would have. Rest easy, Dad. You truly were one of one.