Sean Mahoney, a longtime football coach at Marlborough High, passed away at the age of 63 after a battle with Multiple System Atrophy, a neurodegenerative disorder that gradually erodes motor control. He was remembered for his dedication to his students and his sense of humor, qualities that defined his presence on and off the field.
Mahoney’s coaching journey began in 1994 at Shrewsbury High, where he spent six seasons refining his approach before moving to Assumption University, where he again served as head coach for six years. In 2004 he returned to the high school ranks, taking the helm of the Marlborough High football program.
During his tenure at Marlborough High he compiled a career record of 154 wins, earned induction into the Massachusetts High School Football Coaches Association Hall of Fame in 2024, and was named MIAA Coach of the Year for the 2020‑21 season. He also taught history at the school, weaving lessons of strategy and storytelling into his classroom.
A Legacy That Extends Beyond the Field
Mahoney is survived by his wife Nikki, three children — Dan, James and Michaella — and two grandchildren, including grandson Sheamus, with whom he shared a final football memory on Thanksgiving. His daughter Michaella Mahoney‑DaSilva, a former standout softball pitcher at Worcester State, now teaches in Marlborough and coaches field hockey and softball, continuing a family tradition of athletic involvement.
Ken Stukonis, the current Marlborough head coach, recalled a 25‑year relationship that began when he served as Mahoney’s assistant for four seasons. He described Mahoney as a mentor whose influence shaped a generation of players and whose humor and commitment left an indelible mark on the program.
Tributes have highlighted Mahoney’s impact across the region, from the halls of Marlborough High to the campuses of Assumption University and Worcester State, where he was inducted into the Hall of Fame in 2018, and to the Massachusetts High School Football Coaches Association, which honored his contributions to the sport.